Answer: £326
Explanation:
Step 1: Calculate the cost per jumper
To find out how much Ryan spent on each jumper, we divide the total cost by the number of jumpers.

This gives us a cost of £3.25 per jumper.
Step 2: Calculate the revenue from selling 80% of the jumpers
Ryan sells 80% of the 40 jumpers, so:

So he sold 32 Jumpers.
He sells each jumper for £12:

So his revenue from selling these jumpers is £384
Step 3: Calculate the revenue from selling the remaining jumpers on the Buy one get one half price offer
Ryan has 8 jumpers left after selling 80% of them. He puts these on a Buy one get one half price offer, which means that for every jumper sold at full price, he sells another one at half price.
This means that he sells 4 jumpers at full price (£12 each) and 4 jumpers at half price (£6 each).
His revenue from selling these jumpers is:

Step 4: Calculate the total revenue
Ryan's total revenue is the sum of the revenue from selling 80% of the jumpers and the revenue from selling the remaining jumpers on the Buy one get one half price offer.
This is:

So Ryan's total revenue is £456
Step 5: Calculate the total cost
Ryan's total cost is the amount he spent on buying the jumpers, which is £130.
Step 6: Calculate the profit
Ryan's profit is the difference between his total revenue and his total cost:

Therefore, Ryan makes a profit of £326.