The Following Data Is Related to the Time Required to Post

Essay

The following data is related to the time required to post checks drawn by the Last National Bank's depositors:
$$\begin{array} { l r } \text { Number of checks posted } & 795 \\\text { Total elapsed minutes } & 520 \\\text { Rest period minutes } & 12 \\\text { Interruption minutes } & 15\end{array}$$ Required:
a.Calculate the standard posting time per check.
b.Calculate the combined rest and interruption time as a percentage of the standard time per check.