can someone help me to solve these

Figure the stock turnover at retail for the six month period from February through July if planned sales are $88,114.00. Given the following information: February BOM stock $39,000.00 March BOM stock $38,000.00 April BOM stock $35,000.00 May BOM stock $ 35,000.00 June BOM stock $34,000.00 July BOM stock $26,000.00 August BOM stock $33,000.00 If planned retail additions to stock for the month are $208,000.00 and the planned markup was 45%, determine additions to stock at cost. a) $141,140.00 Ob) $401,110.00 c) $11,411.00 d) $114,400.00