What is the simplest way to allow a customer who purchases a product (even with varying attribute options) to get a $5 discount for every six products purchased.
example number of products ordered:
1 ($0 total discount)
2 ($0 total discount)
3 ($0 total discount)
4 ($0 total discount)
5 ($0 total discount)
6 ($5 total discount)
7 ($5 total discount)
8 ($5 total discount)
9 ($5 total discount)
10 ($5 total discount)
11 ($5 total discount)
12 ($10 total discount)
13 ($10 total discount)
14 ($10 total discount)
15 ($10 total discount)
16 ($10 total discount)
17 ($10 total discount)
18 ($15 total discount)
etc
example number of products ordered:
1 ($0 total discount)
2 ($0 total discount)
3 ($0 total discount)
4 ($0 total discount)
5 ($0 total discount)
6 ($5 total discount)
7 ($5 total discount)
8 ($5 total discount)
9 ($5 total discount)
10 ($5 total discount)
11 ($5 total discount)
12 ($10 total discount)
13 ($10 total discount)
14 ($10 total discount)
15 ($10 total discount)
16 ($10 total discount)
17 ($10 total discount)
18 ($15 total discount)
etc
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