Gross margin decreased in the nine month period primarily due to the decrease in units shipped and increase in costs per units shipped, including underutilization of production resources at both the ATG and CPG. The gross margin decreased at the ATG, including improved mix of units shipped is approximately $2,452,000. The gross margin decreased at the CPG, including an improved mix of units shipped is approximately $478,000, as compared to the same period in 2020.
The Company’s consolidated gross margins from operations increased approximately $1,937,000 or 1,173.9% for the three month period ended September 30, 2021 when compared to the same period in 2020. Gross margin increased in the three month period at the ATG of approximately $2,138,000 offset by a decrease at the CPG of approximately $201,000.
Gross margin increased in the three month period primarily due to the increase in units shipped and improved costs per units shipped, including the underutilization of production resources at the ATG of approximately $2,138,000. Gross margin decreased in the three month period primarily due increase of costs per unit shipped, including the underutilization of production resources partially offset by an increase in units shipped at the CPG of approximately $201,000, compared to the same period in 2020.
Selling, General and Administrative Expenses
Selling, general and administrative (SG&A) increased approximately $2,681,000 or 43.9% for the nine month period ended September 30, 2021 when compared to the same period in 2020. SG&A expenses at the ATG increased approximately $2,529,000 or 52.1%. The increase is due to legal settlements of approximately $1,800,000, legal fees of approximately $895,000 and professional fees of approximately $513,000 offset by a decrease of employee wages and benefits approximately $553,000 and a net decrease of all other ATG SG&A expenses of approximately $126,000 as compared to the same period in 2020. In addition, SG&A expenses at the CPG increased approximately $152,000 or 12.1%. The increase is due to legal settlements of approximately $90,000 and employee wages and benefits of approximately $87,000 offset by a net decrease of all other CPG SG&A expenses of approximately $25,000 as compared to the same period in 2020.
Selling, general and administrative (SG&A) increased approximately $2,515,000 or 120.0% for the three month period ended September 30, 2021 when compared to the same period in 2020. SG&A expenses at the ATG increased approximately $2,328,000 or 136.0% and the CPG increased approximately $187,000 or 48.7%. This is attributable to the increase of the combined legal settlements of approximately $1,890,000, legal fees of approximately $748,000 and professional fees of approximately $130,000 offset by a reductions in employee wages and benefits approximately $115,000 and bad debt expense of approximately $70,000. There was a net decrease of all other SG&A expenditures of approximately $68,000 for the three month period ended September 30, 2021 compared to the same period in 2020.
Other Income
The Company evaluated its eligibility for the ERC for the first three quarters of 2021. Under the aggregation rules of the Relief Act, the Company reviewed consolidated revenue when measuring the decline in gross receipts. All employees of the ATG and CPG are treated as a single employer for purposes of the ERC.
It was determined that the Company qualified for the ERC for both the three month period and nine month period ended September 30, 2021. As a result, for the nine month period ended September 30, 2021 the company recognized approximately $5,622,000 and for the three month period ended September 30, 2021 recognized approximately $1,978,000. The amounts were recorded in other income.
As previously discussed, on September 24, 2021 the Small Business Administration notified the Company that the full amount of the PPP loan was forgiven. The amount of $4,000,000 was recorded in other income.
Operating (Loss)/Income
Income from operations decreased approximately $5,611,000 or (385.6)% when comparing the nine month period ended September 30, 2021 to the same period in 2020 as operating income at the ATG was lower by approximately $4,981,000 and the CPG was lower by approximately $630,000. The consolidated decrease is primarily the result of decreases in revenue and increased SG&A expenditures, as discussed above.
Income from operations decreased approximately $578,000 or (25.6)% when comparing the three month period ended September 30, 2021 to the same period in 2020 as operating income at the ATG was lower by approximately $190,000 and the CPG was lower by approximately $388,000. The consolidated decrease is primarily the result of increases in selling, general and administrative expenses.