6 Decimals on Discounts

Is there a way to use 6 decimals on the discounts options? i ask for this because we are planning on sale postcards and we handle thousands of postcards: 1000, 2500, 5000, 7500 etc so we need to use at least 6 decimals to match the discounts that we offer

you need to alter it from you db manager. use phpmyadmin if you have it.

Thanks so much Daniel, i changed the table to 15.7 now i can handle the discounts and they match exactly to what we need.

My other question will be: when i add options to my postcards and i set a price for one of them, this price is add it to each postcard so if somebody buy 1000 postcards and the total cost is: $71.25 and one the options to add let's call it: Hard Proof PDF and cost $41 this price for this option is added to each postcard so the price will be totally different $41071.25.

Can the price for the option be added after? same when i add a Related Product?

Thanks for your help