An unfavorable labor quantity variance may be caused by paying workers higher wages than expected paying workers a bonus at year end worker fatigue or carelessness higher pay rates mandated by union contracts If an asset costs $70,000 and is expected to have a $10,000 salvage value at the end of its ten-year life and generates annual net cash inflows of $10,000 each year. the cash payback period is 8 years. 6 years 7 years. 5 years If a company's required rate of return is 10% and. in using the net present value method, project's net present value is zero, this indicates that the project's rate of return exceeds 10%. project's rate of return is less than the minimum rate required. project earns a rate of return of 10%. project earns a rate of return of 0%. If there were 70.000 pounds of raw materials on hand on January 1. 140,000 pounds are desired for inventory at January 31. and 420.000 pounds are required for January production, how many pounds of raw materials should be purchased in January? 350.000 pounds 560.000 pounds 280.000 pounds 490.000 pounds The payback method is criticized on the grounds that it: ignores obsolescence factors. ignores the cost of an investment. is complicated to use. ignores the time value of money