Excel is NOT required for this problem. It is easy to do in your head. Think about what happens to the optimal solution.

Jo is making and selling flags. She has available three American banners $($the cloth part of the flag$),$ three British banners, and four flag poles. While banners and poles cannot be sold by themselves, a pole attached to a banner makes a flag. British flags can be sold for a profit of $$3,$ while American flags can be sold for a profit of $$5.$ Jo wishes to maximize her profit from sales. Note that in her optimal solution, she will have leftovers of one or more resources. Nothing in the problem forbids this.

The optimal solution to this problem $($obviously$)$ has Jo making $3$ American flags and $1$ British flag, for an optimal profit of $$18.$ What is the shadow price of an American banner in this problem? $($Enter only the number. I'll assume it's measured in dollars per pole.$)$