Calculate the electricity bill amount for a month of 30 days if the following devices are used:- (1) Two bulbs of 50W for 5 hours (2) Five tube lights of 40 W for 8 hrs. Cost per unit of electricity consumed is Rs 2.50.

Calculate the electricity bill amount for a month of 30 days if the following devices are used:- (1) Two bulbs of 50W for 5 hours (2) Five tube lights of 40 W for 8 hrs. Cost per unit of electricity consumed is Rs 2.50.