if checkbox is checked, capture a value from same row and populate separate sheet
I would like to capture values from specific rows on a source sheet (Estimate Summary) when a check box is checked and send those values to a destination sheet (Allowance Log). When the checkbox is not checked on the Estimate Summary sheet, the value captured on the Allowance Log sheet should be zero. I've tried several different formulas, as well as searched in the help section and the forum and can't figure this out. Screen shots are attached. I'm a fairly new Smartsheet user and any help would be really appreciated!