QUES: Imagine a company with 500 employees purchasing software at 35 per user 35 X 500 users a whopping 17500

correct the punctuation.

CORRECTED: Imagine a company with 500 employees purchasing software at $35 per user - $35 X 500 users = a whopping $17,500!!!

QUES: Eg Consider an ATM enquiry system

correct the punctuation.

CORRECTED: Eg. Consider an ATM enquiry system:

QUES: In 1850 the eastern and western edges of this area was where the wealthy of the city resided

correct the punctuation.

CORRECTED:
In 1850 the eastern and western edges of this area was where the wealthy of the city resided.