Sum every nth row
All data is in the range B5:B16 andnis entered into cell F5 as 3. This value can be changed at any time. In thelatest version of Excel, the easiest way to do this is to use the FILTER function. This is the value returned to FILTER as theincludeargument. FILTER uses this array to “filter” values in the range B5:B16. Only values associated with TRUE make it through the filter operation....