12. (10 points) Inca Incorporated produces products A, B, and C from a joint manufacturing process. Joint costs of $120,000 were incurred in the most recent period. Other Information includes: B C Units Produced 2,496 4,810 1,500 Sales Price per unit at Split-off $25.00 $10.00 $13.00 Sales Price per unit, after additional processing $34.00 $19.00 $15.00 Separable processing costs $36,480 $16,126 $11,748 a. Determine the amount of joint costs alloted to each product using the Sales Value at Split-Off method. (round intermediate calculations to four decimals, round answers to dollars) b. Determine the amount of joint costs allocated to each product using the Net Realizable Value (NRV) method. (round intermediate calculations to four decimals, round answers to dollars) c. Which product mix combination of the production and sale of each product maximizes total operating income for Inca Inc.? Show calculations and specify the product mix combination.