It costs $1000 to produce 100 t-shirts in a day, and it costs $1300 to produce 140 t-shirts in a day. Assume that the daily cost is a linear function of the number of t-shirts produced per day. a. Determine the marginal cost per t-shirt. b. Determine the fixed daily cost.

A company charting its profits notices that the relationship between the number of units sold x and the profit P is linear. If 600 units sold results in $4623 profit and 675 units sold results in $8598 profit, find the marginal profit, which is the rate of change of the profit. The marginal profit is

Assume it costs Microsoft $4,300 to manufacture 5 Xbox 360s and $6,850 to manufacture 10. Obtain the corresponding linear cost function. C(x) =        What was the cost (in dollars) to manufacture each additional Xbox? $  Use the cost function to estimate the cost of manufacturing 50 Xboxes (in dollars). $

A company produces very unusual CD's for which the variable cost is $ 11 per CD and the fixed costs are $ 35000. They will sell the CD's for $ 55 each. Let a be the number of CD's produced. Write the total cost C as a function of the number of CD's produced. C = $ Write the total revenue R as a function of the number of CD's produced. R= $ Write the total profit P as a function of the number of CD's produced. P = $ Find the number of CD's which must be produced to break even. The number of CD's which must be produced to break even is