prices of raw materials, which increased average selling price per pound by approximately $1.90, partially offset by a lower-value product mix and other pricing considerations, which decreased average selling price per pound by approximately $1.24.
Sales to the aerospace market were $48.5 million in the first quarter of fiscal 2022, an increase of 97.3% from $24.6 million in the same period of fiscal 2021, due to a 106.2% increase in volume, partially offset by a 4.3% decrease in average selling price per pound. The aerospace market has experienced increased demand as inventory throughout the aerospace supply chain begins to be replenished in response to the expected increase in engine build rates. Additionally, demand in the first quarter of fiscal 2021 was depressed by COVID-19 pandemic, that decreased demand for air travel resulting in decreased demand for new planes and maintenance parts. The decrease in average selling price per pound largely reflects a lower value product mix, increased competition and other pricing factors, which decreased average selling price per pound by approximately $2.87, partially offset by higher market prices of raw materials, which increased average selling price per pound by approximately $1.71.
Sales to the chemical processing market were $17.5 million in the first quarter of fiscal 2022, an increase of 14.4% from $15.3 million in the same period of fiscal 2021, due to a 32.1% increase in volume, partially offset by a 13.4% decrease in average selling price per pound. Volume was higher as industrial activity increased with economies beginning to reopen from pandemic shutdowns as well as increases in oil prices resulting in expanded capital expenditures in the sector. The decrease in average selling price per pound reflects a lower value product mix, as well as pricing competition and other factors, which decreased average selling price per pound by approximately $5.59, partially offset by higher market prices of raw materials, which increased average selling price per pound by approximately $2.19.
Sales to the industrial gas turbine market were $14.6 million in the first quarter of fiscal 2022, an increase of 4.5% from $14.0 million for the same period of fiscal 2021, due to a 4.4% increase in average selling price per pound and a 0.1% increase in volume. The increase in average selling price per pound reflects higher market prices of raw materials, which increased average selling price per pound by approximately $1.63, partially offset by a lower-value product mix and pricing competition and other factors, which decreased average selling price per pound by approximately $0.86.
Sales to other markets were $14.5 million in the first quarter of fiscal 2022, an increase of 13.4% from $12.8 million in the same period of fiscal 2021, due to a 32.0% increase in average selling price per pound, partially offset by a decrease in volume of 14.1%. The decrease in volume was primarily attributable to lower shipments into the flue-gas desulphurization market which also contributed to an improved product mix. The average selling price per pound increase reflects a higher-value product mix and other pricing factors, which increased average selling price per pound by approximately $5.66, as well as higher market prices of raw materials, which increased average selling price per pound by approximately $2.70.
Other Revenue. Other revenue was $4.4 million in the first quarter of fiscal 2022, a decrease of 21.0% from $5.6 million in the same period of fiscal 2021. The decrease was due primarily to decreased toll conversion.
Cost of Sales. Cost of sales was $81.7 million, or 82.1% of net revenues, in the first quarter of fiscal 2022 compared to $71.2 million, or 98.6% of net revenues, in the same period of fiscal 2021. The decrease in costs as a percentage of revenues was primarily due to higher volumes sold which eliminated the requirement that fixed costs be directly expensed as was the case in the first quarter of fiscal 2021 which had $5.9 million of costs directly expensed to Cost of Sales.
Gross Profit. As a result of the above factors, gross profit was $17.8 million for the first quarter of fiscal 2022, an increase of $16.8 million from the same period of fiscal 2021. Gross margin as a percentage of net revenue increased to 17.9% in the first quarter of fiscal 2022 as compared to 1.4% in the same period of fiscal 2021. The first quarter of fiscal 2021 was adversely impacted by the COVID-19 pandemic as volumes reduced significantly.
Selling, General and Administrative Expense. Selling, general and administrative expense was $11.4 million for the first quarter of fiscal 2022, an increase of $1.6 million, or 16.7%, from the same period of fiscal 2021. Selling, general and administrative expense as a percentage of net revenues decreased to 11.4% for the first quarter of fiscal 2022 compared to 13.5% for the same period of fiscal 2021. Higher incentive compensation expense and higher foreign exchange losses were the primary drivers of the increased expense in the first quarter of fiscal 2022. Additionally, temporary cost containment initiatives that were in place during the first quarter of fiscal 2021, in response to the COVID-19 pandemic, were subsequently ended, which contributed to the higher expense in the first quarter of fiscal 2022 as compared to the same period of fiscal 2021.
Research and Technical Expense. Research and technical expense was $0.9 million, or 0.9% of net revenue, for the first quarter of fiscal 2022, compared to $0.8 million, or 1.1% of net revenue, in the same period of fiscal 2021.
Operating Income/(Loss). As a result of the above factors, operating income in the first quarter of fiscal 2022 was $5.5 million compared to operating loss of $(9.5) million in the same period of fiscal 2021.