I need to make a form where customer choose subscription product (Basic, Pro or Premium), and then the price is calculated based on which month the order is done.
Example. Customer orders Pro in may (month = 5), Price = 49 x (12-5) = 343
Its actually more complex than this... (theres a fixed price and a monthly price based on the product chosen)... Premium costs 250 + 49 per month for the rest of the year = 249 + (49 x (12 - 5)) = 592, Pro costs 200 + 39 per month, etc.