Profit or Loss Calculation for Selling Toys

Given:
- Number of toys bought = 10
- Cost of buying 10 toys = ₹400
- Selling price per toy = ₹45

To find:
- Profit or loss incurred

Calculating the Cost Price (CP):
- Cost of buying 10 toys = ₹400
- Cost price per toy = total cost / number of toys
- CP = ₹400 / 10
- CP = ₹40

Calculating the Selling Price (SP):
- Selling price per toy = ₹45

Calculating the Profit or Loss:
- Profit or loss = Selling price - Cost price
- Profit or loss = SP - CP

Substituting the values:
- Profit or loss = ₹45 - ₹40
- Profit or loss = ₹5

Interpretation:
- The shopkeeper made a profit of ₹5 by selling each toy.

Explanation:
To calculate the profit or loss made by the shopkeeper, we need to find the difference between the selling price and the cost price.

First, we find the cost price (CP) by dividing the total cost of buying 10 toys (₹400) by the number of toys (10). The cost price per toy is ₹40.

Next, we determine the selling price (SP), which is given as ₹45 per toy.

To find the profit or loss, we subtract the cost price from the selling price. In this case, the difference is ₹5. Since the selling price is higher than the cost price, the shopkeeper made a profit of ₹5 per toy.

In summary, the shopkeeper made a profit of ₹5 per toy by selling them at ₹45 each.