How to Maximize the Average Spend Per Customer Per Visit?

I want the business to maximize the amount of money each customer spends per visit. If I'm investing in something, we put it through that litmus test. Is that going to help us increase the average spend per customer per visit? That's how I can gauge whether that's something I can do now or something I sort of wait on. We bought a vending machine almost straight away after buying the store. The reason that we got the vending machine is because people forget their laundry detergent and we can have laundry detergent for sale at a significant markup. By doing that, we can increase the spend per customers per visit. People are paying for a wash, a dry, a laundry deter