I'm using eCart for a winery (who sell their wine online of course). I've been able to set up 10% discounting on 6 or more bottles and 20% discount on 12 or more bottles. Thankfully they've gone with a flat shipping rate, variable to various locations around Australia (so it's 'flat' in the sense that no matter what you order the shipping is a set fee for your location).
All well and good so far and working well, but they now want to sell other things too, such as a $10 voucher for their restaurant and cleanskin cases (of 12 bottles each). However both products are void of the 10/20% discount. I can kind of get around the cleanskin problem by charging it through at 120% so that it gets discounted by 20% when it goes through the checkout, but if they happen to order a $10 voucher to go with it it'll go through at $8 rather than $10.
So the underlying question here is how can I get products to go through the checkout system and circumvent discounting and shipping? Within the management system I've been able to set up controls to turn either