Fishy Business Easy

Aishah is volunteering for a programme delivering meals to people with limited mobility, and she has a budget of $100 to shop for fishburger ingredients. It costs $4 for a packet of 10 fish patties and $3 for a packet of eight buns. How many packets of each should she buy to maximise the number of fishburgers she can assemble? She can have extra ingredients left over, but she won’t serve a patty without a bun or vice versa.