Based on the total amount my workflow send approval mail to approver

Summary:

Hi i have a requirement where a workflow notification needs to send for the approval based on the total amount that is coming to message based workflow from BIP report through integration how can i achieve this i have designed a workflow there i have designed using descison model it will go approval based on the amount like attached screenshot

if amount is less than or equal to 15M then it will go for project manager if he approves then project director then if he approves it will end

same goes for the <=25m but here it will add another approver after project director it will go senior director