E-junkie is primarily a shopping-cart and download-fulfillment service; as such, all of our other features depend on first using our cart to take orders and proceed to checkout using your choice of online payment processors (i.e., you can still checkout with PayPal while using our cart service instead of PayPal's cart). Our cart and product settings are pretty easy to configure using our Seller Admin interface (rather than modifying button code like PayPal's cart), and our button codes are ready-made, copy'n'paste HTML blocks with no configuration required in the code itself -- just paste them into your raw page source wherever you want our cart buttons to appear, and they "just work".
To set your quantity discount, go into your E-junkie Seller Admin > Cart Discount Settings and create a discount with no codes (so it applies automatically) for 18.2% off (20.00 off per item / 109.95 full price = 0.1819...) the item total for any minimum order amount of $110.00 (so QTY=1 would not cross that threshold, but 2 would), with a maximum use count of 0 (=no limit to how often it will auto-apply based on your criteria).
Our Affiliate links do not provide any discounts; they only calculate a commission due back to the referring Affiliate, which we total up for each Affiliate on a monthly basis and you can pay back to them however you wish (though we support and recommend monthly PayPal Mass Payments as the typical payback method). For the Hop Link method, all buyers would be referred to your site for actual shopping and purchase, while setting a cookie good for 6 months (or whenever they delete browser cookies) that would tell the E-junkie cart to calculate commissions due to the referring Affiliate for every Hop-Link-enabled product that buyer purchases from you during the life of that cookie. The buyer would pay you in full, and you would pay 10% (in your case) of the purchase price back to the referring Affiliate.
