Engineering and product development expenses were $77,295 for the three-month period ended December 31, 2023, and $101,670 for the comparable quarter of the prior year, a $24,375 (24.0%) decrease. These expenses decreased primarily due to a reduction in product development costs.
Interest Income (Expense). Interest income of $24,746 was recorded in the three months ended December 31, 2023 on refunded customs charges. Our interest expense was $36,310 for the quarter ended December 31, 2023, compared to interest expense of $76,755 for the quarter ended December 31, 2022. Interest expense is dependent upon the total amounts borrowed from the Factor and changes in interest rates during the period as compared to the corresponding period of the prior year.
Net Income. We reported net income of $102,176 for the quarter ended December 31, 2023, compared to a net income of $341,312 for the corresponding quarter of the prior fiscal year, a $239,136 (70.1%) decrease in net income.
Nine Months Ended December 31, 2023 and 2022
Sales. Net sales for the nine months ended December 31, 2023, were $15,071,204 compared to $16,251,106 for the comparable nine months in the prior period, a decrease of $1,179,902 (7.3%). Sales decreased principally due to the timing of orders and delays in both manufacturing, due to supply chain disruptions, and to delays in shipping and handling of containers at California ports of entry. While delays in manufacturing and shipping have improved somewhat over the past fiscal year, we continue to experience significant delays in receiving inventory for sale.
Gross Profit Margin. The gross profit margin is calculated as net sales less cost of goods sold expressed as a percentage of net sales. The Company’s gross profit margin was 30.0% for the period ended December 31, 2023, and 28.8% for the period ended December 31, 2022. Gross margins were impacted principally during the nine month period ended December 31, 2023, by variations in the mix of products sold.
Expenses. Selling, general and administrative expenses were $4,068,162 for the nine months ended December 31, 2023, compared to $3,750,348 for the comparable nine months in the prior year. As a percentage of sales, these expenses were 27.0% for the nine-month period ended December 31, 2023, and 23.1% for the comparable 2022 period. As previously referred to above, these expenses increased principally as a result of recording additional product liability insurance costs due to increased sales exposure in the prior fiscal year and due to increased expenditures for selling administrative costs.
Engineering and product development expenses were comparable at $273,673 for the nine months ended December 31, 2023, to $294,177 for the comparable period of the prior year.
Interest Income (Expense). Interest income of $24,746 was recorded on refunded customs charges for the nine-month period ended December 31, 2023. Our interest expense was $120,315 for the nine months ended December 31, 2023, compared to interest expense of $200,776 for the nine months ended December 31, 2022. Interest expense is dependent upon the total amounts borrowed from the Factor and changes in interest rates during the period as compared to the corresponding period of the prior year.
Net Income. We reported net income of $80,881 for the nine months ended December 31, 2023, compared to a net income of $435,776 for the corresponding period of the prior fiscal year, a decrease in net income of $354,895 (81.4%).
Operating activities provided cash of $225,962 for the nine months ended December 31, 2023. This was primarily due to a decrease in accounts receivable and amount due from factor of $311,821, and an increase in accounts payable and accrued expenses of $874,648, and partially offset by an increase in inventories, prepaid expenses of $1,050,814 and net income of $80,881. Operating activities provided cash of $347,270 for the nine months ended December 31, 2022. This was primarily due to net income of $435,776, a decrease in inventories and prepaid expenses of $1,719,546, and a decrease in accounts receivable and amount due from factor of $98,698. This was partially offset by a decrease in accounts payable and accrued expenses of $1,921,596.
There were no investing activities for the nine months ended December 31, 2023, or 2022.