Another day, another math problem

If you want to calculate your score from the May 1st practice test, use the following formula:
 
X = (#correct on MC Section) x 1.2499 (DO NOT round)
 
Y1 = (score on Q1) x 3.0556 (DO NOT round)
 
Y2 = (score on Q2) x 3.0556 (DO NOT round)
 
Y3 = (score on Q3) x 3.0556 (DO NOT round)
 
Z = X+Y1+Y2+Y3 (Round to the nearest whole number)
 
If Z is between 110-150, you'd earn a 5.  
If Z is between 96-109, you'd earn a 4.  
If Z is between 81-95, you'd earn a 3.  
If Z is between 60-80, you'd earn a 2.  
If Z is between 0-59, you'd earn a 1.