BE$5\mathrm{.}8($LO $3),$ AP An icon reads, Excel. Rachel wants to use her knitting skills to make a little extra money so she can enjoy a theatre weekend with her besties. She$$s got a pattern down for a hat, scarf, and mittens, but she realizes that her available time is limited$.$ She should be able to sell as many of any item as she can make $($they all sell for $$15),$ but she only has $20$ hours available between now and her theatre outing. See below for cost and time information.

Hat

Scarf

Mittens

Time $($minutes$)$

$20$

$30$

$40$

Cost of yarn $($per unit$)$

$$4$

$$6$

$$4$

Using Excel Solver, calculate how many of each item Rachel should make in order to maximize her contribution margin given her time constraint.

Evaluate a special order decision.