Josh billed three of his six customers incorrectly. Tom was billed $120 instead of $1,200. Martha was billed $480 instead of $680. Nancy was billed $350 instead of $450. Michael was billed $400 correctly. Susan was billed $620 correctly. Paul was billed $525 correctly. What percent of the total amounts billed was incorrect? A. 55.3106% B. 5902275% C. 24.5161% D. 35.6129%
