I need help with a simple formula:
I have attached a spreadsheet example.
Concept:
Total Charge
Three Savings Buckets A, B, C
Bucket A Savings = Total Charge minus Bucket A Allowance
Bucket B may be null with no activity so
when I start with Bucket C, formula needs to start with the Bucket A Allowance
All Buckets with values
Charge A Allow A Save B Allow B Save C Allow C Save
500 350 150 300 50 100 200
500 - 350 350 - 300 300 - 100
Bucket with Null Value
Charge A Allow A Save B Allow B Save C Allow C Save
500 350 150 Null Null 300 50
500- 350 350 - 300
Need formula sees null and takes last subtotal > 0 and Null = no entry at all not zero
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