Solution:
Part 1)
QBEP = FC/ (R-VC)
QBEP = 80000/(4000-400) = 22.22 = 23
23 cameras would be sold in order to break even
Part 2)
Profit/loss = Q * (R-VC) - FC
Profit/loss = 100*(4000-400)-80000 = 280000
280000 would be the profit if the 100 cameras are made and sold in 1 month
Part 3)
Q = (FC+P)/( R-VC)
Q = (80000+50000)/(4000-400) = 36.11 = 37
37 cameras must be sold to realize a profit of Rs. 50,000?