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 $=0\mathrm{.}5$ yards$)$

$\backslash$table$[[,$Estimated Beginning,Desired Ending$],[$Medallions$,$Inventory,Inventory$],[$Ribbon $($yards$),1,200,870],[,50,23]]$

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.