When should the salutation "Dear Prospective Customer" be used? When you don’t know the person’s name When you don’t know the title of the individual This salutation should be avoided When you are writing a mass email

Suppose an economy has only two sectors: goods and services. each year, goods sells 80% of its outputs to services and keeps the rest, while services sells 62% of its output to goods and retains the rest. find equilibrium prices for the annual outputs of the goods and services sectors that make each sector's income match its expenditures.