Columns A & B contain the number of hours worked by each ID this week.
Columns D & E contain the equivalent information for last week.
We want a total of the hours worked by a specified ID over the entire period.
Use the SUMIF function as shown as shown in the following formula:
=SUMIF(A3:A7,B10,B3:B7)+SUMIF(D3:D7,B10,E3:E7) Screenshot // Summing the Number of Hours an Employee Worked During a Two Week Period