Which solution is correct for following question?????

A man bought 300 bananas at Rs 18 per dozen and sold them at a loss of Rs 75. What is the selling price of 10 bananas?

Solution 1)
Cost price = 300/12*18 = 450
sold for 450-75 = 375
selling price per banana = 375/300 = 1.25
selling price of 10 bananas = 10(1.25) = 12.50

Solution 2)
cost = 300/(18/12) = 200
(200-75)/300 * 10 = ____

#1 looks good. Sorry about #2.

If you check the units, you will see my mistake.