Have answers... need to know how to work through problems

15. From the following data, calculate the operating cash flow (OCF) from the project for year 1: Sales Costs $4,000 Depreciation for year-1 $2,000 Tax rate = 40% $8,000 a. $1.200 b. s3.200c. $2,980 d. $1,980 e. none of the given answers Money that a firm has already spent on a project regardless of whether the proiect is taken is called a. fixed cost b. opportunity cost c. initial cost d. variable cost e.sunk cost 17. The following rate of returns for Stock A: (Historical data) Use this data to answer questions 17 and 18) Year Stock A 201X 201Y 201Z 35% 20% -10% e of returns for Stock A Calculate the a. 10% (b. 15%)c. 18% d, 22% e, none of the given ones 18. The standard deviation of returns for Stock A is: (approximately) 22.9%) 18.7% d. none of the given ones 15% d. a.25%(b