price_excl_vatand price_incl_vat . I agree that is not the bast way to store the information as there is a field vat_rate.price_excl_vat the other field should be calculated based on the vat_rate, and if the user types into the price_incl_vat field, it should also calculate the exclusive vat price.->live()->afterStateUpdated() method don't seems to works, if the connection is slow you miss some typed characters.