Need help with writing a program

Hi,

       I need help with a certain problem. So I have done calibration on a set of instruments. The serial numbers as well as the calibration factors associated with them are given in the first 2 columns of the excel sheet. Now I am running all the instruments (I don't have cal factors for some) and I am getting a certain calibrator count as shown in columns F and G.

Now the issue is I need to compare the serial numbers of all the instruments with the subset to see which ones have cal factors associated with them. For instruments with cal factors, I need to multiply the cal factor (associated with that serial number) with the count for that particular instrument and output the result. So I need to write a mathcad program to output only the serial numbers of instruments with cal factors as well as the product of cal factor and count. I am attaching the excel sheet. I am using Mathcad Prime 6. Thanks for the help.