Subtotals in pricing proc

*Following is the issue :*

In pricing procedure , there are two discount types 1 and 2 .

Working:

Discount 1 is applicable on PR00

The resulting value is updated in subtotal 2

Another discount2 is used which is applicable on subtotal 2.

The result is not updated in any of the subtotal.

Requirement is to update this in subtotal 2

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PR00 : 100 usd ( base price)

Discount 1: 10 % ( Discount cond 1)

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Discount Amount : 10

Discount subtotal : 90 ---Subtotal 2 (currently updating)

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Discount 2 : 50% ( Discount cond 2)

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Discount Amount 2: 45

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net Item value : 45 ******* need to be updated in subtotal 2