Question 1A shop sells two kinds of products $A$ and $B$. One day, a salesman sold both $A$ and $B$ at the same price of 2100 dollars to a customer. Suppose product $A$ makes a profit of $20\%$ but product $B$ makes a loss of $20\%$. Then this dealmakes a profit of 70 dollarsmakes a loss of 70 dollarsmakes a profit of 175 dollarsmakes a loss of 175 dollarsmakes no profit or loss