switching from cost to percentage in table rate?

[schwimwastaken]

Hi there guys,

We asked our latest client how she wanted to do her shipping, and this was the method that she wants:

$0-$20=$5.95
$21-$30=$7.95
$31-$50=$9.50
$51-$100=$9.95
$101 < = 10%

I was doing super until we switched to percentages. Is there a way to do this, or do I need to continue putting the 10% price equivalent in the table in small increments(lots'o'work!)?

thanks,
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