A company sells 500 sleds per month for $80. Variable costs are $41 per unit and fixed expenses are $3,500 per month. The company thinks that using a new material would increase sales by 70 units per month. If the new material increases variable costs by $4 per unit, the impact on contribution margin would be a .

b) a student tests 100 students to determine whether other students on her campus prefer soda brand a or soda brand b and finds no evidence that preference for brand a is not 0.5. later, a marketing company tests all students on campus and finds no difference. choose the correct answer below.

Use the following account numbers and corresponding account titles to answer the following question. account no. account title (1) cash (2) merchandise inventory (3) cost of goods sold (4) transportation-out (5) dividends (6) common stock (7) selling expense (8) loss on the sale of land (9) sales which accounts would appear on the income statement?

Stocks a, b, and c are similar in some respects: each has an expected return of 10% and a standard deviation of 25%. stocks a and b have returns that are independent of one another; i.e., their correlation coefficient, r, equals zero. stocks a and c have returns that are negatively correlated with one another; i.e., r is less than 0. portfolio ab is a portfolio with half of its money invested in stock a and half in stock b. portfolio ac is a portfolio with half of its money invested in stock a and half invested in stock c. which of the following statements is correct? a. portfolio ab has a standard deviation that is greater than 25%.b. portfolio ac has an expected return that is less than 10%.c. portfolio ac has a standard deviation that is less than 25%.d. portfolio ab has a standard deviation that is equal to 25%.e. portfolio ac has an expected return that is greater than 25%.