Task $4$: Sask 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$).$

$[10$ Marks$]$

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: