result of increased sales exposure in the prior fiscal year, while the prior year period included a reduction in salaries expense of approximately $181,000 resulting from recording an employee retention credit under the CARES Act.
Engineering and product development expenses were $131,415 for the three-month period ended September 30, 2023, and $103,245 for the comparable quarter of the prior year, a $28,170 (27.3%) increase. These expenses increased primarily due to additional product development costs.
Interest Expense. Our interest expense was $33,509 for the quarter ended September 30, 2023, compared to interest expense of $68,525 for the quarter ended September 30, 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 (Loss) Income. In addition to the differences between the 2023 and 2022 periods discussed above, the Company’s net income for the quarter ended September 30, 2022, included a reduction in salaries expense resulting from recoding an employee retention credit under the CARES Act. For all of the above reasons, we reported a net loss of $186,425 for the quarter ended September 30, 2023, compared to a net income of $200,602 for the corresponding quarter of the prior fiscal year, a $387,027 (192.9%) decrease in net income.
Six Months Ended September 30, 2023 and 2022
Sales. Net sales for the six months ended September 30, 2023, were $10,416,226 compared to $10,492,445 for the comparable six months in the prior period, a decrease of $76,219 (0.7)%. 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 29.0% for the period ended September 30, 2023, and 28.4% for the period ended September 30, 2022. Gross margins are impacted by variations in the mix of products sold and due to continued increases in the cost of certain electronic components.
Expenses. Selling, general and administrative expenses were $2,757,290 for the six months ended September 30, 2023, compared to $2,571,846 for the comparable six months in the prior year. As a percentage of sales, these expenses were 26.5% for the six-month period ended September 30, 2023, and 24.5% for the comparable 2022 period. As a dollar amount these expenses increased by $185,444 principally as a result of recording additional product liability insurance costs due to increased sales exposure in the prior fiscal year.
Engineering and product development expenses were comparable at $196,378 for the six months ended September 30, 2023, to $192,507 for the comparable period of the prior year.
Interest Expense. Our interest expense was $84,005 for the six months ended September 30, 2023, compared to interest expense of $124,021 for the six months ended September 30, 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 (Loss) Income. In addition to the differences between the 2023 and 2022 periods discussed above, the Company’s net income for the quarter ended September 30, 2022, included a reduction in salaries expense resulting from recoding an employee retention credit under the CARES Act. For all of the above reasons, we reported a net loss of $21,295 for the six months ended September 30, 2023, compared to a net income of $94,464 for the corresponding period of the prior fiscal year, a decrease in net income of $115,759 (122.5%).
Operating activities provided cash of $650,519 for the six months ended September 30, 2023. This was primarily due to a decrease in accounts receivable and amount due from factor of $534,490, and an increase in accounts payable and accrued expenses and of $1,239,275, and partially offset by an increase in inventories, prepaid expenses of $1,105,053 and a net loss of $21,295. Operating activities used cash of $378,841 for the six months ended September 30, 2022. This was primarily due to an increase in accounts receivable and amount due from factor of $1,276,912 and a decrease in accounts payable and accrued expenses of $177,454 offset by a decrease in inventories and prepaid expenses of $970,998, and net income of $94,464.