An index is to be constructed to show the changes in the price of selected hardware items sold from 1986 to 2017. The prices and quantities consumed in the two periods are shown at the right. Using 1986 as the base period, compute a simple average of the price relatives. Item 1986 2017 Price Quantity Price Quantity Hammer (each) $6 100 $12.5 120 Linseed Oil (qt.) 2 1000 8 1100 Sandpaper (sheet) 0.1 800 0.9 900 1/2 hp. motor (each) 30 10 100 15 Question 7Select one: a. 364.45 b. 368.10 c. 318.64 d. 423.15 e. 460.42