governmental grant recognized as revenue from sales of EVs and chargers was $1.2 million, $0.1 million, and $1.9 million, respectively.
For the year ended December 31, 2021, the period from November 13, 2020 to December 31, 2020 (Successor) and the period from January 1, 2020 to November 12, 2020 (Predecessor), the amount of governmental grant recognized as reductions of the cost of sales for EV leasing was $0.3 million, $0.2 million, and $0.03 million, respectively.
Cost of Revenues
For the three months ended March 31, 2022 and 2021:
For the three months ended March 31, 2022 and 2021, our costs of revenues were $0.6 million and $0.4 million, respectively. The increase in cost of revenues is consistent with the increase in revenues.
For the year ended December 31, 2021 (Successor), the period from November 13, 2020 (Successor) to December 31, 2020, and the period from January 1, 2020 to November 12, 2020 (Predecessor):
For the year ended December 31, 2021, the period from November 13, 2020 to December 31, 2020 (Successor), and the period from January 1, 2020 to November 12, 2020 (Predecessor), our costs of revenue were $3.5 million, $0.5 million and $4.5 million, respectively. The decrease in cost of revenues is consistent with the decrease in revenues. Our costs of revenue consist primarily of direct parts, material and labor costs, as well as shipping and delivery and other costs.
Operating Expenses
Operating expenses consist of selling, general, administrative expenses.
Our selling, general and administrative expenses which consist primarily of salaries, research and development, professional service fees, rent expense, and office supplies expenses.
For the three months ended March 31, 2022 and 2021:
For the three months ended March 31, 2022 and 2021, our operating expenses were $3.0 million and $2.0 million, respectively. The increase in operating expenses is mainly due to the increase in salaries and wages, professional service fee and insurance expenses.
For the year ended December 31, 2021 (Successor), the period from November 13, 2020 (Successor) to December 31, 2020, and the period from January 1, 2020 to November 12, 2020 (Predecessor):
For the year ended December 31, 2021, the period from November 13, 2020 to December 31, 2020 (Successor), the period from January 1, 2020 to November 12, 2020 (Predecessor), our operating expenses were $13.8 million and $1.1 million, and $3.7 million, respectively. The increase in operating expenses is mainly due to the increase in salaries and wages, and research and development cost. The increase in salaries and wages is due to the increase in headcount and expected production expansion, and the increase in research and development cost is due to that we were in the process of developing next generation of electric vehicles and new models of electric vehicles.
Other (Expenses) Income, net
Other (expenses) income, net includes interest expense and other income (expenses), net.
For the three months ended March 31, 2022 and 2021:
Our other income for the three months ended March 31, 2022, were $0.6 million, primarily due to the gain from forgiveness of a PPP loan.