Regarding product life cycles, a good marketing manager knows that: Group of answer choices a company's marketing mix usually should be kept constant over the product life cycle. industry profits are increasing well after sales start to decline. all of the above. entirely different target markets may be involved at different stages of the product life cycle. once a market goes into sales decline, oligopoly conditions set in.

d. low interest rates

the correct option is c

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.