 Hello and welcome to the session. In this session, we will discuss the following question and the question says, a shark keeper buys a microwave oven for $760 at a discount of 5% on the printed price. He marks up the printed price by 10% and sells it for $902, which includes sales tax on the marked price. Find 1, rate of sales tax, 2, his profit. Let's start the solution now. First, we will do an assumption. Suppose the printed price of the oven is equal to X dollars. It is given that there is a discount of 5% on the printed price. So, a discount is equal to 5% of the printed price, which is X dollars. This is equal to 5 upon 100 into X dollars, which is equal to 5X upon 100 dollars. Therefore, cost price of the shopkeeper is equal to the printed price, which is X dollars minus the discount, which is 5X upon 100 dollars. This is equal to 95X upon 100 dollars. It is given that the shopkeeper buys the microwave oven for $760. So, this implies 95X upon 100 is equal to 760. This implies X is equal to 760 into 100 upon 95. Now, 519 times is 95 and 20 times is 100 and 930 times is 760. This implies X is equal to 40 into 20, which is equal to 800. Therefore, printed price is equal to 800 dollars. We will now find the marked up price, which is equal to the printed price, which is 800 plus 10% of the printed price, that is 10% of 800 dollars. This is equal to 800 dollars plus 10 upon 100 into 800 dollars. Zeroes get cancelled. So, this is equal to 800 80 dollars. Therefore, marked up price is equal to 880 dollars. It is also given that the selling price is 902 dollars. So, selling price is equal to 902 dollars. Now, we have to find in part 1 the weight of sales tax. So, we will start part 1 now. Total sales tax charged is equal to selling price minus marked up price. This is equal to selling price, which is 902 dollars minus marked up price, which is 880 dollars. This is equal to 22 dollars. Now, the rate of sales tax is equal to sales tax upon marked up price into 100. This is equal to sales tax, which is 22 dollars upon marked up price, which is 880 dollars into 100. Now, the zero gets cancelled and 22, 4 times is 88 and 2, 2 times is 4 and 5 times is 10. So, this is equal to 5 upon 2, which is equal to 2.5%. So, therefore, rate of sales tax is equal to 2.5%. This is the answer for part 1. In part 2, we have to find profit of the shopkeeper. So, for part 2, profit of the shopkeeper is equal to selling price minus cost price. Now, sales tax is not included in the profit. So, we will subtract the sales tax from the selling price. This implies profit is equal to selling price, which is given to be 902 dollars. So, we write 902 dollars minus the sales tax, which is 22 dollars, the whole minus the cost price, which is also given as 760 dollars. So, we write 760 dollars. This is equal to 880 dollars minus 760 dollars and this is equal to 120 dollars. So, therefore, profit is equal to 120 dollars. This is the answer for part 2. With this, we end our session. Hope you enjoyed the session.