Shop of one type of goods

Mini store under one type of goods with categories. Currency, payment of goods can be connected to any payment system by API). by admin:
Adding / removing categories;
Adding / removing / changing goods;
The price of the goods is indicated in U.S. dollars ($);
- at the exit price in the Ukrainian grivna (the course is constantly passed from the website of the Private Bank).

php 7.4 + mysql (pdo) + bootstrap 4.3 + ajax