Christine's pet shop buys cat litter for $15.00 less 20% per bag. The store's 1 point overhead is 45% of cost and the owner requires a profit of 20 % of cost. a) For how much should a bag be sold? b) Calculate the amount of markup. * (i) $18.90 (ii) $8.70 None of the answers is correct 0 (0) $23.75 (ii) $6.45 0 (0) $13.75 (ii) $9.50 0 (0) $19.80 (it) $7.80