Suppose that there are two industries, a and b. there are five firms in industry a with sales at $5 million, $2 million, $1 million, $1 million, and $1 million, respectively. there are 4-firms in industry b with equal sales of $2.5 million for each firm. the four-firm concentration ratio for industry a is: a. 0.9. b. 1.0. c. 0.8. d. 0.7.

The card shoppe needs to maintain 21 percent of its sales in net working capital. currently, the store is considering a four-year project that will increase sales from its current level of $349,000 to $408,000 the first year and to $414,000 a year for the following three years of the project. what amount should be included in the project analysis for net working capital in year 4 of the project?