Dave purchased 150 bales of cotton at Rs. 70 per bale. He spent Rs. 500 on the transportation, paid octroi at the rate of 40 paise per bale and paid Rs. 140 to the coolie. What must be the S.P. per bale to have a gain of 20%?
Rs 100
Rs 50
Rs 110.75
Rs 89.60
Rs 92.50