1 what is the a) amount of selling expenses b) amount of total variable cost c) amoubt of total fixed costs d) amount of contribution margin

with solutions please

Gibson Guitars & Instruments, the current owner of Epiphone, one of the best guitar brands is a leading producer of quality instruments based on their molds and designs. They have contracts with instrument manufacturers for an average cost of P3,520 and then sell them to retail companies for an average price of P5,950. During the month, Gibson Guitars & Instruments sold 80 Epiphones. The company's selling, general, and administrative (SG&A) costs related to the product line are presented below: Selling: Advertising Sales salaries and commissions Delivery costs to customers Utilities Depreciation of sales facilities General & Administrative: Staff salaries Insurance P3,000 per month P7,500 per month, plus 12.5% of sales P250 per instrument sold P2,000 per month P300 per month P25,000 per month P2,000 per month P150 per month, plus P50 per instrument sold P120 per month Clerical Depreciation of office equipment