Among the costs kunee company incurred during the month of august were the following: $15,000 - coolant used in the headquarters office air-conditioning system; $45,000 - property taxes on factory building; $10,000 - depreciation on trucks used to deliver products to customers; $2,000 - salary paid to a factory quality control inspector. the period costs from the above list total: a) $7,000.b) $25,000.c) $32,000.d) $30,000.