Your firm receives 40 checks per month. Of these, 10 are for $1,200 and 30 are for $500. The delay for the $1,200 checks is 4 days; the $500 checks are delayed 6 days. What is the weighted average delay? A. 4 days B. 4.5 days C. 5 days D. 5.5 days E. 6 days.