A mixture of two commodities A and B is in the ratio x:y. Commodity A costs Sh. 60 per unit and commodity B costs Sh. 72 per unit. If the mixture is sold at Sh. 78 per unit, what is the profit percent

14. Step 1: Define the cost price of the mixture. Let the ratio of commodity A to commodity B be x:y. The cost of commodity A is Sh. 60 per unit. The cost of commodity B is Sh. 72 per unit. The total cost of the mixture is C_mix = 60x + 72y. The total number of units in the mixture is x+y. The average cost price per unit of the mixture is (60x + 72y)/(x+y). Step 2: Relate the selling price to the cost price using the profit percentage. The selling price of the mixture is Sh. 78 per unit