1) Inventory Sub Items - 2) multiple discounts for a p/n

1 - Our products may grouped into categories... ... Product Category 1 ... Product Category 2 etc Is this a good use of the "Sub Item" option when creating a new inventory item?

2 - We have multiple discounts for each product... but each product only has one part number... (No discount if we sell direct, discount one if we sell to a retailer, discount two if we sell to a wholesaler, discount 3 if we sell to a distributor, etc.)

In the New Item setup QB Basic ask for Sales Price.

How can we setup the various discounts for the item without creating a new part number for each one??

thanks for any help.