Hi,

Is it possible to make a custom field that acts like the discount field in quotes?  I would like the option to have the field pop up exactly like Discount but instead of subtracting money it adds money (shipping cost in this case).  I would like it to allow me to a percentage or a flat amount of money.  So it adds 3.5% (or whatever percent we say) or $300 or what ever flat rate we want.

Thanks