On Android you can do similar to what @HangarRash said, but a bit different.

You still need 3 consumable in-app purchase product

• 1 token for $1

• 10 tokens for $10.

• 100 tokens for $100.

So user will have an option to choose quantity of the product that he want to buy.

If user wants to buy 456 tokens, he needs make 3 purchases

1. 100 tokens with quantity 4

2. 10 tokens with quantity 5

3. 1 token with quantity 6

Main difference between IOS and Android is that you can't predefine quantity of purchases, and

user will need to make 3 separate purchases

More info: https://youtu.be/yuvN2WZKIxo?t=73