In addition to the basic trade discount of 20%, an outboard engine manufacturer gives a boat dealer

Question:

In addition to the basic trade discount of 20%, an outboard engine manufacturer gives a boat an additional discount of 12.5% for providing follow-up warranty service, and a 5% discount for co-operative advertising and boat-show promotions.
a. After the basic trade discount, what further price reduction (in dollars) does the 12.5% discount represent on an engine with a list price of $3000?
b. After the first two discounts, what price reduction does the 5% discount give on the $3000 engine?
Dealer
A dealer in the securities market is an individual or firm who stands ready and willing to buy a security for its own account (at its bid price) or sell from its own account (at its ask price). A dealer seeks to profit from the spread between the...