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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 P3,570 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 P5,000 per month P7,500 per month, plus 12.5% of sales Sales salaries and commissions Delivery costs to customers Utilities P 300 per instrument sold P2,000 per month P300 per month Depreciation of sales facilities General & Administrative: Staff salaries Insurance P25,000 per month P2,000 per month P150 per month, plus P50 per instrument sold Clerical Depreciation of office equipment P120 per month Question 9 1 pts Total fixed cost amount to P Question 10 1 pts The net operating income amount to P Question 11 1 pts Total contribution margin amount to P Question 12 1 pts Total general and administrative expenses amount to P. Question 13 1 pts Total selling expenses amount to P D Question 14 1 pts Total variable costs amount to P D Question 15 1 pts 2 3 Gross margin amount to P 4 5 6