Real time counter for El Colmado

I am Ubaldo Valverde, from El Colmado, a new gourmet shop located in the center of Berlin (Alexanderplatz) for the sale of Spanish food products ([login to view URL]). For every product that El Colmado sells, we donate 5 meals to children in need in collaboration with a famous NGO. We would like to place a real-time counter ([login to view URL]) in the window of our shop so that for every product checked-out in our Sum-up Point of Sale (PoS), the counter sums 5 meals per product sold (e.g. if the counter shows 30,000 meals and we sell 2 products, 10 new meals will be summed in the Flapit counter, reflecting 30,010 meals). We would like to also include a meals’ counter in our webpage (similar to this one: [login to view URL]). Actions: 1/ before purchasing the mentioned counter I want to know, from the API information that I have received from Sum-up (I already have it and can inmediately provide it) and the below from Flapit**, if it is possible to connect it to our PoS Sum-up and 2/ this being the case, I would like to set it up in both our store (I would place the counter in our window) and our webpage. **Flapit has informed that they use the following API documentation [login to view URL] and has mentioned that the Sum-up API should be integrated here: [login to view URL] If this collaboration is succesful, we may work together on several improvements and implementation on our webpage ([login to view URL]).