What kind of bills and change do I need? Never used this service before.

There are coin changing machines for $1, 5, 10 and 20 dollar bills. There are 4 different size machines.

You can also use debit card on some. 😊

They have coin changers for 1's 5's etc. Depends on which machine you use for how much it will cost. I use the next up from smallest. It costs $5 a load to wash in that machine. Dry can cost from 1.50 up, depending on what fabrics you are drying. Hope this helped.