Hello Pike
sorry for the confusion caused.
Referring to this above attachment. Cell D21 already has a formula SUM(D17:D20) , however I require this to be in effect only when the option buttons in Rows 17, 18, 19, 20 are enabled, otherwise when they are disabled I would like a value "0" to be taken in cell D21. Hence Part A+Part B CellD23 will consider only Part A value, Part B value being 0.
I tried this code
but it works but closes down the sheet.
Can you pls guide me on how to work this out?
Thanks
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