Assemble a formula by combining helper columns

[nigelog]

I have a calculated result which is comprised with the aid of helper columns

the final formula

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works where "E16"

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"B16"

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and "C16"

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I combined them as

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which does compute but with a wrong result.

Can anyone see where I have erred?? Any help appreciated

[Stormin']

Why combine them? As you've found, it makes it incredibly difficult to debug and maintain. Simpler formulas are more impressive than convoluted ones

[nigelog]

Makes sense...just have to hide away the helper columns....Ta