Sarita bought eggs at Rs.8.40 a dozen. At what price per hundred must she sell them so as to earn a profit of 15%
CP of 12 eggs =Rs.8.40
CP of 1 egg =Rs.8.40÷12=Rs.0.7
Therefore, CP of 100 eggs 0.7×100=Rs.70
SP of 100 eggs =100+Profit%100×CP
=115100×70
=Rs.80.5