A book dealer bought 100 books for $1250. If she sold 30% of these at $10 each and the rest at $15 each, what was her total profit?
1250 / 100 = $12.50 each
30 * 10 = 300
70 * 15 = 1,050
300 + 1,050 = $1,350
1,350 - 1,250 = $_________
thank you
Well, if she bought 100 books for $1250, that means she paid an average of $12.50 per book. So, let's calculate her total revenue first.
If she sold 30% of the books, that would be 30% of 100, which is 30 books. Selling each of those at $10 would give her a revenue of 30 * $10 = $300.
Now, she has 70% of the books left, which is 70 books. Selling each of those at $15 would give her a revenue of 70 * $15 = $1050.
Her total revenue is $300 + $1050 = $1350.
Since her initial investment was $1250, we subtract that from her revenue to find her profit. $1350 - $1250 = $100.
So, her total profit is $100. I guess selling books can be quite lucrative after all!
To find the total profit, we need to determine the total revenue from selling the books and subtract the cost.
First, let's find out how many books the dealer sold at $10 each. We know that 30% of the 100 books were sold, so we can calculate it as:
30/100 * 100 = 30 books
Therefore, the dealer sold 30 books at $10 each, which gives a revenue of:
30 * $10 = $300
Next, to find out how many books are left to be sold at $15 each, we subtract the number of books sold from the total number of books:
100 - 30 = 70 books
Now, we can calculate the revenue from selling these remaining books:
70 * $15 = $1050
The total revenue from selling all the books is the sum of the revenue from selling 30 books at $10 each and 70 books at $15 each:
$300 + $1050 = $1350
Finally, to find the total profit, we subtract the cost from the revenue:
Total profit = Total revenue - Cost
= $1350 - $1250
= $100
Therefore, the dealer's total profit is $100.