Using the following forecasted demand data, develop an aggregate plan using a constant level strategy:

$-$ Months: July, August, September, October, November, December

$-$ Forecasted demand: $1250,1100,950,900,1000,1150$

$-$ The initial inventory is $500$ products and it is desired to have a final inventory of $400$ products in December.

$-$ To produce a product, $5$ hours per employee are required $($that is$,1$ product every $5$ hours $/$ worker$).$

$-$ There are currently $20$ days available to work each month and each employee works $8$ hours each day.

$-$ At this moment there are $35$ workers.