Adjusted Gross Profit and Adjusted Gross Profit Margin for the quarter ended December 31, 2021 was $10.8 million or 25.3% of revenue, a decline from $13.5 million or 32.0% of revenue for the quarter ended December 31, 2020. Adjusted Gross Profit and Adjusted Gross Profit Margin for the year ended December 31, 2021 was $34.0 million or 23.1%, respectively, a decrease from $63.4 million or 37.0%, respectively, for the year ended December 31, 2020, due to the reasons described above. Excluded from Adjusted Gross Profit for the year ended December 31, 2021 and 2020 are $1.8 million and $2.0 million, respectively, of overhead costs associated with operating at lower than normal capacity levels, which were charged directly and separately to cost of sales rather than as a cost attributable to production.
Sales and marketing expenses for the quarter ended December 31, 2021 were $9.3 million, an increase of $1.7 million from $7.5 million from the quarter ended December 31, 2020. Sales and marketing expenses for the year ended December 31, 2021 were $31.0 million, an increase of $3.0 million from $28.0 million for the year ended December 31, 2020. The increases were largely related to increased salary and wage expenses as we continue to build our sales organization, higher depreciation and operating expenses as we completed our Chicago and Dallas DXCs in 2020 and 2021, respectively, and increased travel, meals and entertainment as restrictions on travel have eased. These increases were partially offset by lower commission expense.
General and administrative expenses for the quarter ended December 31, 2021 were $8.0 million, an increase of $2.3 million from $5.7 million from the quarter ended December 31, 2020. General and administrative expenses increased $3.9 million to $30.6 million for the year ended December 31, 2021 from $26.7 million for the year ended December 31, 2020. The increase was due to higher salaries, benefits and severance costs and $0.9 million of incremental professional fees, of which $0.8 million were incurred in the fourth quarter. In addition, the year ended December 31, 2020 included a $1.2 million reversal of a provision in the fourth quarter relating to a claim for severance by one of our former founders and a $0.6 million credit loss, both of which were not repeated in 2021.
Operations support expenses for the quarter ended December 31, 2021 were $2.5 million, an increase of $0.2 million from $2.3 million for the quarter ended December 31, 2020. Operations support expenses for the year ended December 31, 2021 of $9.4 million were consistent with 2020.
Technology and development expenses for the quarter ended December 31, 2021 were $2.2 million, an increase of $0.3 million from $1.9 million for the quarter ended December 31, 2020. Technology and development expenses increased by $0.1 million to $8.2 million for the year ended December 31, 2021, compared to $8.1 million for the year ended December 31, 2020, primarily related to a decrease in capitalized software development costs offset by lower variable compensation provision and other burdens in the current year.
Net loss increased to $16.0 million or $0.19 net loss per share for the quarter ended December 31, 2021 from net loss of $4.2 million or $0.05 net loss per share for the quarter ended December 31, 2020. The increase in net loss is due to a $3.1 million decrease in gross profit, a $6.2 million increase in operating expenses, a $2.9 million reduction of government subsidies and a $0.9 million increase in interest expense as a result of the convertible unsecured subordinated debentures issued on January 25, 2021 and December 1, 2021 and draws on the Leasing Facilities. These decreases were partially offset by a $0.8 million reduction in foreign exchange losses and a $0.5 million increase in income tax recoveries.