A real estate salesperson bought promotional calendars and date books to give to her customers at the end of the year. The calendars cost $0.750.75 each, and the date books cost $0.500.50 each. She ordered a total of 500500 promotional items and spent $350350. How many of each item did she order?

Calenders = 400

Date book = 100

Explanation:

In this instance we will derive an equation to solve the problem.

Assume that quantity of calenders is q.

Therefore

500-q = number of date books

Total price = summation of (price * quantity)

$350 = 0.75q + 0.5 (500-q)

350 = 0.75q + 250 - 0.5q

350 = 0.25q + 250

0.25q = 350-250 = 100

q = 100/0.25 = 400

So calenders is equal to 400

And date books = 500-q = 500-400

Date books = 100