how to implement serial approval in a sequence in CPQ

Summary:

I have 3 level of approver in a sequence and each have different discount factor. Once the user submit for approval , it must pass thru all the 3 approver .

Level -1 Approver - 10 to 15 % discount factor

Level -2 Approver - 16 to 25 % discount factor

Level - 3 Approver - > 25

User applied 30 % discount . it must be approved by Level-1 , Level-2 and Level-3 lastly in a sequence.

it will be helpful to give ur suggestion with sample code or steps.

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