Carter inc can make 100 units of necessary component part with the following costs Dierct materials $120, 000 Direct labor $20, 000 Variable overhead $60, 000 Fixed overhead $40, 000 If carter can purchase the component externally for $220, 000 and only $10, 000 of fixed costs can be avoided what is the correct make or buy decision? A. buy and save $30, 000 B. Buy and save $10, 000 C. Make and save $30, 000 D. Make and save $10, 000.