This is correct; there is some double compensation.
746W per machine => 7.46KWh per day. Multiply by $0.03 USD/KWh (=1.5 INR) to get $0.22/day or $0.00022 per napkin, slightly cheaper than the industrial solution. In other words, the household machines are about half as efficient with power but their cheaper rates on power more than compensates.
In terms of overall efficiency, other factors like raw materials, transportation, etc. are likely to dominate--the power expenditure is small for both options.
746W per machine => 7.46KWh per day. Multiply by $0.03 USD/KWh (=1.5 INR) to get $0.22/day or $0.00022 per napkin, slightly cheaper than the industrial solution. In other words, the household machines are about half as efficient with power but their cheaper rates on power more than compensates.
In terms of overall efficiency, other factors like raw materials, transportation, etc. are likely to dominate--the power expenditure is small for both options.