Marigold Corp. can produce 100 units of a component part with the following costs: $20000 Direct Materials Direct Labor 4500 Variable Overhead 18000 Fixed Overhead 11000 If Marigold Corp. can purchase the units externally for $50000, by what amount will its total costs change? An increase of $15500 Anincrease of $7500 A decrease of $11000 An increase of $50000