The function is discrete, as the fee is charged based on the hours
-29664 is the correct answer. This mostly deals with the zeros and crossing them off
M<6 is 60
Since AC and BD are parallel, <6 and <4 are supplementary.
supplementary means = 180 degrees
Since m<6 is 60 degrees, subtract 60 from 180 to get <4
180 - 60 = 120
M<4 is 120
hope this helps