Is this pricing scheme possible in OSCommerce?

[fredbird67]

This is the first time I've ever worked on an E-commerce site, and I've been trying to find the answer to this one:

 

I've got a client who wants items priced as follows:

 

For her class "A" items, she wants them to be 1 for $15, 2 for $25, 3 for $35, 4 for $45, and so on. Basically, what this boils down to is $10 for each item plus $5, with the $5 not being multiplied. Is this a pricing scheme that can be set up in OSCommerce, and if so, how?

 

For the record, her class "B" items are $15 for each item plus $6, class "C" items are $20 per item plus $7, and...well, you get the idea. Anyhoo, is this something that can be set up?

 

Thanx in advance,

Fred