-2-5-7 = -14

Please explain the answer & why there are minus signs

enny's Builders increased inventories by $2 million, reduced accounts payable by $5 million, and spent $7 million on capital expenditures (in fixed capital). What is the total effect of these transactions on the firm's Free Cash Flows? Note: Enter your answer without the millions or the dollar sign, so if you think the answer is $5 million, just enter 5 ) Numeric Response