[#6610 ] Buying electricity Here is an extract from our electricity bill . The coloured text has been added to highlight the rate , with the rate ' being the price per KW hr : We buy electrical energy at ENERGY X RATE COST USED 92 Days 294.3 kWh 24.9000c $73.27 ENERGY X RATE = CREDIT PURCHASED (03/12/13 - 04/03/14) 92 Days 8834 KWh 6.6000c $58.30 but we sell them (solar) electrical energy at Over the 92 days of this bill , what is the average rate at which the company supplied energy to this household ? P = P= Watts (Take the 92 days as 2 significant figures: the electricity meter is read by an employee whose time of reading could be at any time during the day .) Also , don't give an answer , but think about how many 'labourers ' (using the example in the lesson ) we would need to employ to provide energy at this average rate