Pricing algorithm to calculate markup based on item attribute

Following is the issue details:

• We have an item having Primary UOM as "C6" and Secondary UOM as "Each". Both belong to item class "Quantity".
• Standard Conversion for C6 = 6 Each
• In the price list, price of the item is $20/Each.
• Sales order is created in C6.
• However, there is a markup which is calculate in "Litre".
• Since, "Litre" is not either primary or secondary UOM, we can't use it in discount list for that item. However, we will create a discount list with Item Level = "All Items" and capture the discount in 'Litre"
• We will capture volume (ml) for each item in item EFF. For example, if 1 Each = 500 ml, we will capture that in item EFF.