Proctor Electronics has a markup of 60% on the selling price of its portable chargers. Last month, the store purchased 140 items and sold 80 at the regular selling price of $85. During a weekend sale, a 25% markdown was offered, following which 45 items were sold at the reduced price and the remaining sold at cost. Calculate the following:

a. Total cost of the portable chargers.

b. Total sales of the portable chargers.

c. Net amount of markup.

d. Net rate of markup based on total sales.

AppendixLO1