bottle r contains 100 capsules and costs $ 6.30 . bottle t contains 130 capsules and costs $ 2.99 . what is the difference between the cost per capsule for bottle r and the cost per capsule for bottle t ?
"cost per capsule in r is 6.30 / 100 = 0.063 cost per capsule in t is 2.99 / 130 = 0.023 the difference is 0.004 the answer is a"
subtract(divide(2.99, 130), divide(6.30, 100))