I need a free app that solves the following problem:
Say I have three orders, one includes 500g of minced meat, another includes 1.5kg of beef liver and the third includes 1kg of minced meat and 500g of chicken breasts.
I need an app that when I select these orders, it shows me how much I need to purchase of each product, in the example case: 1.5kg minced meat + 1.5kg beef liver + 500g chicken breasts