Jan's Bakery is considering a merger with Tina's Cookies. Jan's total operating costs of producing services are $390,000 for a sales volume of $2.9 million. Tina's total operating costs of producing services are $84,000 for a sales volume of $690,000. If the two firms merge, calculate the total average cost for the merged firm assuming no synergies. (Round your answer to 2 decimal places). A. 13.20%, B. 13.45%, C. 12.17%, D. 16.34%