In \(2015\), the number of graduating seniors taking the ACT exam was \(1,924,887\). In \(2011\), a total of \(1,612,665\) graduating seniors took the exam. By what percent did the number increase over this period of time?
The manufacturing cost of an air-conditioning unit $544, and the full-replacement extended warranty costs $113. If the manufacturer sells 506,970 units with extended warranties and must replace 20% of them as a result, how much will the replacement costs be? (Note: Assume manufacturing costs and replacement costs are the same.)