*Please show me how to solve this step by step!* Thank you!

A company can sell all the units it can produce of either Product A or Product B but not both. Product A has a unit contribution margin of $20 and takes two machine hours to make and Product B has a unit contribution margin of $34.5 and takes three machine hours to make. If there are 5000 machine hours available to manufacture a product, income will be

$7500 more if Product A is made.

the same if either product is made.

$7500 less if Product B is made.

$7500 less if Product A is made.