Question $21(1$ point$)$

Assume that the normal duration of activity $A$ is $23$ days and that it can be shortened to $13$ for an added cost of $$2200,$ the crash cost per day is$,$

Note:

$1-$ Round your final answer to the nearest integer.

$2-$ Do not include the $ symbol in your answer. For instance, if the crash cost per day is $$56\mathrm{.}76,$ just enter $57.$