and Explain how you got the Answer. Page 290 23. Outdoor Lightning Patios Plus sold an outdoor lightning set for $119.95. The mark-up on the set was $23.99. Find (a) the cost, (b) the markup percent on cost, and (c) the selling price as a percent of cost. 25. Tractor Parts Bismark Tractor put a markup of 26% on the cost on a part for which it paid $450. Find (a) the selling price as a percent of cost, (b) the selling price as a percent of cost, and (c) the markup