just solve the blank on which its written solve

that is total cash in in december

Month September October November December Cash-in AIR Total Cash In $ 576792 $ 414332 $ 731006 $ 887697 $727839 $ 584712 $ 620211 $ 791122 ? SOLVE? $ 255471 $ 125634 $ 243587 593434 $ 176906 $ 283570 $ 381438 $ 78271 Cash-out A/P Depreciation Total Cash- out Cash Available . The depreciation expense for each month has been calculated as $177389