What is the optimal consumption bundle and marginal utility per dollar?
The optimal consumption bundle is the consumption bundle which maximizes a consumer's total utility specified his or her budget constraint.
The marginal utility per dollar spent onto a good or service is the additional utility through spending one more dollar on which good or service.
Marginal utility per dollar spent onto a good = marginal utility of one unit of the good/price of one unit of the good = MUgood/Pgood