A hand-held telephone set that cost a dealer $240 less 55% and 25% is marked up 230%

Question:

A hand-held telephone set that cost a $240 less 55% and 25% is marked up 230% of cost. The overhead expenses are 25% of the regular selling price. For a sales promotion, the telephone sets were reduced 40%.
(a) What is the regular selling price?
(b) What is the sale price?
(c) At the sale price, what profit or loss was realized?
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...