Markup word problem help needed!

[kepoly]

This is the problem I am working on;

A store in Vancouver has operating expenses of 30.00% of the selling price and the operating profit is 45.00% of the selling price. During a sale, their watches were marked down by 30.00%. What is the profit or loss at the sale price if they purchased the watches at $759.00 each? (If the amount represents a loss, express your answer as a negative dollar amount).

I have tried to input: 79.70 as the answer and it is not correct, shed some light please!

 

[tkhunny]

A store in Vancouver has operating expenses of 30.00% of the selling price and the operating profit is 45.00% of the selling price. During a sale, their watches were marked down by 30.00%. What is the profit or loss at the sale price if they purchased the watches at $759.00 each? (If the amount represents a loss, express your answer as a negative dollar amount).

One piece at a time:

Purchase Price: $759.00
Regular Selling Price: SP = $759.00 + Margin è $759.00 + 45%*SP = SP è $759 = 55%SP è SP = $1,380.00

Margin: 45% * SP = $621.00

What's next?