I need to define something like this in a Wordpress Website with Woocommerce.
PRODUCT 30 pills ... $105 + $15 Next Day Shipping
PRODUCT 60 pills ... $125 + $15 Next Day Shipping
PRODUCT 90 pills ... $145 + $15 Next Day Shipping
PRODUCT 120 pills ... $165 ** FREE Next Day Shipping **
PRODUCT 180 pills ... $215 ** FREE Next Day Shipping **
The last 2 packages 120 and 180 always are Free. The other packages always have a $15 for Next Day Shipping.