ABC Trailers assembles different types of small camping trailers demanded between January and June

of each year. The demand generally peaks in April and May. Next year's aggregate demand forecast

beyond the regular capacity is given in the following table:

The company can hire temporary workers to meet the above requirements. Each temporary worker

can produce $15$ units per month. Hiring$/$training cost is approx. $$1,000$ per temp worker.

Inventory holding cost per camping trailer per month is $$50,$ charged to average inventory level during

a month. Before January, there are no camping trailers on hand. $270$ extra units are desired in inventory

at the end of June. Any shortage during a period is backordered at a cost of $$150$ per camping trailer

per month.

Find the monthly and total costs of Plan A $($Chase$)$ and Plan B $($Adjusted Chase$).$

Plan A $-$ Chase:

Note: Ending inventory of $270$ units is desired in June, hence, in June, the output is $270$ units more than

the demand.

Plan B $-$ Adjusted Chase: