suppose the market basket consists of 100x, 200y, and 300z. current-year prices are $5 for each unit of x, $2 for each unit of y, and $3 for each unit of z. base-year prices are $2 for each unit of x, y, and z. what is the approximate cpi in the current year? a. 1,200 b. 15 c. 70.20 d. 150