Which of the following costs always differ among future alternatives? fixed costs O historical costs O relevant costs variable costs both relevant costs and variable sts always differ among future alternatives When deciding whether to accept a one-time-only special order from a new customer, management should do all of the following EXCEPT: analyze product costs consider the special order's impact on future prices of their products O determine whether enough capacity is available to provide the order o verify past design costs for the product none of the above (ie, management should do all the above when deciding whether to accept a one-time-only special order from a new customer) TRUE or FALSE? Waste on the production line will result in an unfavorable materials price variance. True False TRUE or FALSE? If skilled workers with high hourly pay rates are given duties that require little skill and call for lower hourly rates of pay, then this will result in an unfavorable labor rate variance. True False