How to calculate units with range value of numbers

We sell greeting cards and this is how it works

Scenario 1:

1. if you want to send 1 greeting card up to 10 cities then the price will be 15USD
2. if you want to send 1 greeting card up to 25 cities then the price will be 40USD
3. if you want to send 1 greeting card up to 50 cities then the price will be 90USDthe price will increase if cities are over 10 but equal to 25 or less

Scenario 2:

1. if you want to send 2 greeting cards upto 10 cities then the price will be 25USD
2. if you want to send 3 greeting cards upto 25 cities then the price will be 50USDthe price will calculate based on 2 greeting cards cities equal to 25 or less

Here is the Google Sheet link, I am trying to work on but I totally lost it, cannot figure it out at all.