Recipe Change

Hello,
I have searched this forum and cannot find the answer I need. I have an excel spreadsheet and I need the numbers in column B to change in column I on the same worksheet. I have the formula =sum($B$13:$B$24)/f4*.125 in hopes that the totals will change. I've noticed the only data change is in I13. When I drag to fill formula it does not work. There has to be a way to do this without having to type the formula into each row. Please help...

Thank you.

Ruth