Hi, yet another attribute question.

Thanks to the useful answers on this thread I was able to at least get some attributes going, but, I hit a new wall!

Here it goes:
my products are sold by weight and I would like my attribute box to look like:
Sample (20g) 4$
75g 8$
150g 12$
300g 15$
(Sample, 75g, 150g, 300g are the values I gave)

INSTEAD of their actual look;
Sample (20g) (2$) (0.02kg)
75g (8$) (0.08kg)
150g (12$) (0.15kg)
300g (15$) (0.3kg)

So how do I get rid of the weight and the ugly () enclosing the price???

PS: The shipping weight calculates just fine, so does the price.

Xie xie in advance!