Olympia Productions Incorporated makes award medallions that are attached to ribbons. Each medallion requires 18 inches of ribbon. The sales forecast for March is 2,100 medallions. Estimated beginning inventories and desired ending inventories for March are as follows: (Assume 18 inches =0.5 yards) Required: a. Calculate the number of medallions to be produced in March. b. Calculate the number of yards of ribbon to be purchased in March