[question] wich program to make basic analysis?

Hi, my sister sell's cloths in internet, and she ask me if i can make a basic analysis of wich type of cloth she is selling better.
some basic questions, like:

wich brand sell more oft?
wich brand pleople pay more?
wich color sells more?
wich type? (jeans, t/shirt, pants, shorts, etc.)
wich brand is the less sell?
wich size is more asked?

I used to make call analysis for law enforcment, so a little i know, how to find patterns. the problem i dont have anymore i2 analyst notebook :D.
right now i only know how to make't with excel, but it would be good to use a program, i think it will facilitate me the task.