I got a letter, and there is such abstract:

Attached is also instructions on how to put your products in the store. Even if you are formillar with xcart please read these incase we do things a lil different. Emotion: wink Let me know if you have any ?. And please just make sureall your skus start off the same... only changing the last #s Emotion: smile that is how i do payroll, so if the skus change or differ, i might miss them. Emotion: smile

I think I understand it but I am not sure whether I am right. I am concerned about the underlined part.

what are skus? codes?

Thank you in advance!
The passage is terrible English if you have transcribed it accurately.

sku = stock keeping unit. Yes, some kind of numerical coding.
Thank you!!

The passage was just copied....