i cant figure out what i have wrong

c. Depreciation on the building is $2,100. Data table More info Adjustment data at December 31 follow: a. As of December 31 , Fernville had $400 of Prepaid Insurance remaining. b. At the end of the month, Fernville had $400 of office supplies remaining. c. Depreciation on the building is $2,100. d. Fernville pays its employees weekly on Friday. Its employees earn $1,000 for a five-day workweek. December 31 falls on Tuesday this year. e. On November 20, Fernville contracted to perform services for a client receiving $3,200 in advance. Fernville recorded this receipt of cash as Unearned Revenue. As of December 31, Fernville has $2,100 still unearned