Hi @jm15, we use a combination of global shipping ("Shipping Cost Per Order" in Square) and individual item shipping so that as customers add more items to the cart, the shipping total gradually increases.
You can get to the individual item shipping setting in the Store Editor. Click the item to modify it and then scroll all the way down to the Extra Shipping Charge.
Since you are selling individual bars, you may not be able to set up Square with one shipping price for 2 bars, one price for 5 bars and one for 10 bars, but you can get pretty close using per order and per item shipping settings together. For example, let's say X = a $5 shipping cost so that the desired shipping charge by bar volume is:
1-2 bars = $5 shipping
3-5 bars = $10 "
6-10 bars = $15 "
If you set your per order shipping amount to $2.50 and your per item (bar) amount to $1.25, Square would calculate total shipping as shown here for orders of 1 to 10 bars:
1: 3.75 ($2.50 per order + 1.25 per item)
2: 5.00 (the desired $5 for 2 bars)
3: 6.25
4: 7.50
5: 8.75 (Close to the desired $10 for 5 bars)
6: 10.00
7: 11.25
8: 12.50
9: 13.75
10: 15.00 (the desired $15 for 2 bars)
You can play around with the math and get closer to your actual shipping costs. It's not going to be perfect, but you can probably figure out two settings (per order and per item) where on average over many orders, your shipping costs are covered.
FYI, we don't use modifiers very often; mostly we have our products at the "top level".
