Rusthe Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 74 units were sold. Date Explanation Units Unit Cost Total Cost May 1 Inventory 30 $9 $270 15 Purchase 25 10 250 24 Purchase 38 11 418 Total 93 $938 Collapse question part (a) Calculate the weighted-average unit cost. (Round answer to 3 decimal places, e. g. 5.125.) Weighted-average unit cost

Which (if any) of the following scenarios is the result of a natural monopoly? instructions: you may select more than one answer. a. patent holders of genetically modified seeds are permitted to sue farmers who save seeds from one planting season to the next. b. doctors in the united states are prohibited from practicing without a medical license. c. there is one train operator with service from baltimore to philadelphia. d. coal is used as the primary energy in a country with abundant coal deposits.