One price for a stack of one product

I'm wanting to make my products have one price for a stack of items.

Example:
64 Plastic Cups - £4

And then when someone types in the quantity of 2 in the box, it will update to - 128 - £8

Is there anyway that I can do this?

jon4433:

I'm wanting to make my products have one price for a stack of items.

Example:
64 Plastic Cups - £4

And then when someone types in the quantity of 2 in the box, it will update to - 128 - £8

Is there anyway that I can do this?

As the cups come in a "pack" of 64, you are essentially selling a single "pack".

Just tell your customers that each PACK has 64 cups in it.

Product Name: Plastic Cups (Pack of 64)
Product Description: These plastic cups are sold in packs of 64 cups. You need to order this product PER PACK, and in each pack there are 64 cups.
Product Price: 4.00

Thank you :)