Vanshika used 580 unit of electricity in a month. cost per unit= 6.5 rupees per unit find the total cost if fixed charge is rupees 25 Share with your friends Share 0 Rohit Babu answered this Dear Student,Given,Cost per unit,c=Rs.6.5Number of units,u=580Fixed charge,f=Rs.25Total cost=f+u×c=25+580×6.5=25+3770=Rs.3795Regards. 2 View Full Answer