setting price by attirbute only?

hi, just met a problem on how to set price by different attributes.

like original price 10, size L +10, size XL , +20?

i am using 1.39h,

i tried to input digit 10 in the box next to default "+" box, the box under "Prices and Weights",

and it turned as prefix price 10, and an unknown discount generated?

already searched the forum, but no satisfying answer,

thank you in advance!

If you're setting price by attribute only, there won't be an 'original' price.

Check the 'Product Priced By Attributes' button to 'Yes' when you create/edit the product and set the price to 0.00. Then add your price to each attribute.

thank you, but i already listed many products with different price.

is there any way not affecting the original price, just add corresponding price when choosing certain attribute?