sentence: If MUx / Px is less than MUy / Py , then it is the consumer 's duty to buy more of Y. If MUy / Py is less than MUx / Px , then the consumer must use more of X. If you work more , you can consume more , each additional unit yielding additional , marginal utility , so you continually increase the sum of your total utility .
modified: If MUx / Px is less than MUy / Py , than it is the consumer 's duty to buy more of good Y. If MUy / Py is less than MUx / Px , than the consumer must use more of good X. When you work more , you can consume more , each additional unit yielding additional , marginal utility , so you continually increase the sum of your total utility .
transformation: OTHER, ADJ, OTHER, ADJ, OTHER