I have created a timesheet in Excel, with meal breaks, end times and total hours worked for a two week period. The formula =SUM(INT(X10)+Z10) calculates correctely in day 1 of week 1 and through the first week. When I copy the formula to week 2, it does not calculate. I have even entered the formula again, but it does not work. I even tried putting it on a new sheet. I also tried doing a paste special. I need help to complete this timesheet.