SUMIF Formula to Macro or VBA

[ZEIGLDA06]

Hey folks,
I am having a problem with an excel sheet at work. I deal with large amounts of data on a daily basis and I am sick of locking up Excel with complicated formulas. Am I correct in thinking that using a Macro rather than a Formula would speed up the process and allow me to sift through the data more efficiently? If so, I have the SUMIF formula below but I am new to the Macro scene and cannot seem to figure out how to make it work as a Macro. I am trying to add up the total uses across the country for a specific part. So i basically need to add up "Y-T-D SALES" for each part and put it into "TOTAL USES ACROSS THE COUNTRY" column Any help would be much appreciated. Thanks!!

=SUMIFS('MASTER'!E2:E14266, 'MASTER'!E2:E14266, 'DONNIE'!D2)