Creating a dropdown for qty = certain pricing

I have created a store for a client and I am trying to remember how I would go about allowing shoppers to choose a certain item that is associated with a certain price. ie I wanted to buy 50 napkins at $20.00 or 100 of the same napkins for $35.00. I have attached the files for this clients store. Any direction would be greatly appreciated. This is not being created dynamically from a recordset rather just static items.

Thanks.

does this pricing apply to all products, or only certain products?

the specific pricing is only on this product, however, each product has a quantity #, usually 50 and 100 pieces, and then a price associated with each quantity. I hope this makes sense, please let me know if I can clarify better.

so each item will have a 2 available quantities?

and a separate price for each?

is that correct?

Yes, that is correct

ok, so you need a column for
qtyBreak1
Break1Price
qtyBreak2
Break2Price

in the add to cart button, set Quantity to be updaable from a drop down, set the qtyBreak1 column to be the first quantity selection and Break1Price to be the price for that selection.
set qtyBreak2 to the second selection and Break2Price the price for that selection.

after the form is created, populate the list with the 2 qty selections that should be available, and create a new calculation in the cart object as:

abs([Quantity] == [qtyBreak1])?[Price] = [Break1Price]:0

and another calcualtion as:
abs([Quantity] == [qtyBreak2])?[Price] = [Break2Price]:0