Show me the steps to solve on Excel A small backpack manufacturer carries four different models of

backpacks, made of canvas, plastic, nylon, and leather. The bookstore,

which will exclusively sell the backpacks, expects to be able to sell

between $15$ and $40$ of each model. The store has agreed to pay $$35\mathrm{.}50$

for each canvas backpack, $$39\mathrm{.}50$ for each plastic backpack, $$42\mathrm{.}50$

for each nylon backpack, and $$69\mathrm{.}50$ for each leather backpack that

can be delivered by the end of the following week. One worker can

work on either canvas or plastic, can complete a backpack in $1\mathrm{.}5$

hours, and will charge $$7\mathrm{.}00$ per hour to do the work. This worker can

work a maximum of $90$ hours during the next week. Another worker

can sew backpacks made of nylon fabric. He can complete a bag in $1\mathrm{.}7$

hours, will charge $$8\mathrm{.}00$ per hour to work, and can work $42\mathrm{.}5$ hours in

the next week. A third worker has the ability to sew leather. He can

complete a book bag in $1\mathrm{.}9$ hours, will charge $$9\mathrm{.}00$ per hour to work,

and can work $80$ hours during the next week. The following table

provides additional information about each backpack. What is the best

combination of backpacks to provide the store to maximize the profit?

Please solve the problem within Excel and show what formulas were used. I$\text{'}$d also love pictures as well. Thank you so much!