I want to use an if formula that keeps subtracting monthly sales (not average) until stock cover = zero
Closing Stock Closing Stock Cover Months (not average) Jan-17 Feb-17 Mar-17 Apr-17
72,074 127 12 13,186 7,961
369 28 150 675 195
i need to know how many months would each item covers by subtracting the sales of every month with 18 months available
thank you
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