Joanne is looking for a job as a mechanic and plans to distribute business cards at job fairs related to this industry. Her local printer charges $23 per 100 cards and sells them only in sets of 100.
a) Joanne needs 300 cards, how much will it cost her?
b) If she wants to distribute cards to three different job fairs, how many cards will she need in total?
c) What is the minimum number of sets of cards she must buy to cover all three job fairs?
d) If Joanne decides to attend one more job fair and needs 500 cards in total, how many sets of cards should she buy?