Values in the calculation fields are reset in the review page

Hello everyone,

we’ve got a problem with a form we’re making with Ninja Forms for an online shop. There is a calculation feature in it which has to do with values depending on checked radio buttons above. So we’ve made a quite complicated network of logic conditions to make a final price calculation possible. It goes on the page almost trouble-free (with a condition if all of the needed radio button fields are checked), but if submitted, on the review page all the values are reset to 0! If I click on another radio button and back it shows again what’s expected, but any customer who wants to buy something at the shop wouldn’t know about it and he/she would get pretty annoyed! By the way, if clicking back to this page from the next one, this problem is sometimes there, too. So what can we do?