Upon the purchase of specific items, get 10% off for each item
Upon the purchase of specific items, get 5% off for each item
Buy 2 items and get a US$ 1.71 discount, buy 3 items and get a US$ 3.42 discount, buy 4 items and get a US$ 5.13 discount, buy 5 items and get a US$ 6.84 discount, buy 6 items and get a US$ 8.55 discount
