Hi there brittanielane, welcome to the forum.

Let's look at the problem as follows, you have 2 items and each need preparation and baking.

Let's call the numbers (loaves) of bread = B and the number of muffins made = M

Now for preparation and baking you need to come up with a separate equation in terms of B and M. These will be your contraints.

Here's a hint.

Preparation:

Baking:

The objective function in this case will maximise profit, let's call that P, is also in terms of B and M.