In MM pricing schema, there are a list of selection from A to M and 1 to 8. How can we make use of the condition sub-total field ?

Subtotal field on Pricing schema are useful in number of cases.
# For Ex: 1 is Carry over value to KOMP-KZWI1.
# 7 is used for deciding on the basis for which to calculate Rebate subsequent settlement.
# S is used for the final net inclusive, cash discount, rebates and any other conditions including statistical
# For reporting in LIS 
# Used in the layout for printing.