[Kyla]

I bought the Bryers Carb Smart vanilla ice cream. It claims on the from to only have 5g of net carbs per serving, but on the nutritional information it says there are 15g of carbs and 4g of fiber. How does that come out to 5g of net? I thought that you are supposed to subtract the fiber from the total carb count. Does anyone know how this works or if it is ok to eat this?? Thanks!!