Answer:
A. what is the profit made by the retailer if he sells the article to the customer at the catalogue price?
10000
B.What profit is made by the manufacturer if the catalogue price is 50% above the manufacturing price?
25000
Measure of Angle 2 = 100 degrees
measure of Angle 6 = 100 degrees
Since angle 2 and angle 6 are both 100 degrees, this makes them congruent angles. They are also corresponding angles as well.
The fact we have corresponding angles that are congruent leads to AB being parallel to CD. This is using the Converse of Corresponding Angles Theorem.