Micro-Economic Questions. Please help me out

6. Mrs. Simpson buys loaves of bread and quarts of milk each week at prices of $1 and 80 cents, respectively. At present she is buying these products in amounts such that the marginal utilities from the last units purchased of the two products are 80 and 70 utils, respectively. Is she buying the utility-maximizing combination of bread and milk? If not, how should she reallocate her expenditures between the two goods? Explain and discuss . How can time be incorporated into the theory of consumer behavior? Explain the following comment: \"Want to make millions of dollars? Invent a product that saves Americans lots of time.\" Explain and discuss