Abusiness person invested $3600.00 in stock. when he sold the stock he made $30.00 in profit for each share of stock he purchased. if his total profit was $2400.00 how many shares of stock did he purchase?

Given:
$3,600 initial investment in stock
$30 profit for each share upon selling of the stock
$2,400 total profit

2,400 = 30x
2,400/30 = x
80 = x

He purchased 80 shares.

3,600/80 = 45 purchase price per share.
45 + 30 = 75 selling price per share

total profit = sales - cost
2,400 = (75*80) - 3,600
2,400 = 6,000 - 3,600
2,400 = 2,400

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