Price gets added to Option Price - not what I want

Hello

Setting up a new store that sells products with different quantity and pricing options. For example 1 orange $10, 2 oranges $15, 30 oranges $18. If I set the price to $10 and set the three quantity options, the "add to cart" forces you to choose an option. When you choose 1 of the 3 options the shopping cart automatically adds the option price to product price, so 1 orange is charged $20 (Price $10 + Option Price $10), 2 oranges are charged $25 (Price $10 + Option Price $15) and 3 oranges are charged $28 (Price $10 + Option Price $18). How can I stop having the Price added to Option Price? I don't want to set the Price as $0.00 that looks silly.

Thanks
Sergio

Your options are

1. Do not show product price
2. Use below method to update price dynamically as options are selected

http://forum.opencart.com/viewtopic.php?t=68590

Thanks nvedia

This post describes a mod that sounds like exactly what you want:

http://forum.opencart.com/viewtopic.php?f=131&t=51280