a. Depreciation on the company's wind turbine equipment for the year is $6,700. b. The Prepaid Insurance account for the solar panels had a $3,700 debit balance at December 31 before adjusting for the costs of any expired coverage. Analysis of prepaid insurance shows that $1,450 of unexpired insurance coverage remains at year-end. c. The company received $8,100 cash in advance for sustainability consulting work. As of December 31, one-third of the sustainability consulting work had been performed. d. As of December 31, $2,900 in wages expense for the organic produce workers has been incurred but not yet paid. e. As of December 31, the company has earned, but not yet recorded, $570 of interest revenue from investments in socially responsible bonds. The interest revenue is expected to be received on January 12.