Excel expert to show me how to combine 2 Excel files

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Job Description

Hi...
I've been unable to understand the online tutorials to merge 2 different xlsx files into one. One file has about 270 rows of 3 columns, the other has about 35 rows of 10 columns. One column has the same name - Part Number - in both files. The 270 items in the first file should all be in the second file (with roughly 80 "left over"). The resulting file will have the info for part number 123-456 from both files on one row.
Please see the sample worksheet in http://sallymilo.com/sample1.zip for how these files are and should be laid out.
You should be available to train me remotely on my computer (I have GoToAssist, so can get you on my computer) between 9-4 MT any day of the week for the half hour or so this should take to show me & for me to make notes. I want to understand how to do this myself in the future.