Consider the following scenario :

First time computer (PC 1) have lesser profit margin e.g. $100
Second time computer (PC 2) have greater profit margin e.g. $200

Qty sold for PC 1 : 9
Total 9 x 100 = $900

Qty sold for PC 2 : 1
Total 1 x 200 = $200

How can profit increase when total number of PC's sold , Price and profit margin stays the same

Qty sold for PC 1 : 1
Total 1 x 100 = $100

Qty sold for PC 2 : 9
Total 9 x 200 = $1800

A. Competitors are out of scope
B. Printers are out of scope
C. We are comparing within PXC not with competition of PXC
D. As per above scenario
E. We don't know hence cannot conclude anything based on the info provided.