The net income for Martinez Company for 2020 was $305,900. During 2020, depreciation on plant assets was $120,200, amortization of patent was $39,400, and the company incurred a loss on sale of plant assets of $23,500. Compute net cash flow from operating activities. (Show amounts that decrease cash flow with either a - sign e. g. -15,000 or in parenthesis e. g. (15,000).)

Required prepare the necessary adjusting entries in the general journal as of december 31, assuming the following: on september 1, the company entered into a prepaid equipment maintenance contract. birch company paid $3,400 to cover maintenance service for six months, beginning september 1. the payment was debited to prepaid maintenance. supplies on hand at december 31 are $3,900. unearned commission fees at december 31 are $7,000. commission fees earned but not yet billed at december 31 are $3,500. (note: debit fees receivable.) birch company's lease calls for rent of $1,600 per month payable on the first of each month, plus an annual amount equal to 1% of annual commissions earned. this additional rent is payable on january 10 of the following year. (note: be sure to use the adjusted amount of commissions earned in computing the additional rent.)