Generate random number from the break down calculate breakdown time.
Generate random number from the repair distribution and calculate repair time require to get the machine repaired.
Generate random numbers between 2000 to 8000 and estimate lost revenue due to this particular break down.
Calculate the lost revenue by multiplying this number with repair time and revenue from 1 copy ($0.1).
Repeat this process until sum of all the break down time exceeds 52 weeks and calculate the total loos.
The excel output under two different assumptions are given below.