When a t-shirt manufacturer states, "we sell it only in black because that way we can buy plenty of black fabric and run our plant efficiently," its statement reflects the views that were popular in which era of the evolution of marketing?
a) production-oriented
b) sales-oriented
c) market-oriented

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.

You are in the market for a new refrigerator for your company’s lounge, and you have narrowed the search down to two models. the energy efficient model sells for $700 and will save you $45 at the end of each of the next five years in electricity costs. the standard model has features similar to the energy efficient model but provides no future saving in electricity costs. it is priced at only $500. assuming your opportunity cost of funds is 6 percent, which refrigerator should you purchase

Which external factor has enabled addition of special effects in advertisements and tracking of responses of customers over websites?