Which of the following statements regarding the manufacturing systems are correct?

(1). For a MRP system, customer demand forecast is essential for material control
(2). For a pull system, larger lot sizes and shorter lead times are required
(3). For a pull system, a JIT philosophy needs to be solidified within the organization
(4), For a Kanban system, each work station need to respond independently from other work stations

Google started as one of many internet search engines, amazon started as an online book seller, and ebay began as a site where people could sell used personal items in auctions. these firms have grown to be so large and dominant that they are facing antitrust scrutiny from competition regulators in the us and elsewhere. did these online giants grow by fairly beating competition, or did they use unfair advantages? are there any clouds on the horizon for these firms -- could they face diseconomies of scale or diseconomies of scope as they continue to grow? if so, what factors may limit their continued growth?

Carlton industries is considering a new project that they plan to price at $74.00 per unit. the variable costs are estimated at $39.22 per unit and total fixed costs are estimated at $12,085. the initial investment required is $8,000 and the project has an estimated life of 4 years. the firm requires a return of 8 percent. ignore the effect of taxes. what is the degree of operating leverage at the financial break-even level of output?

Suppose the following items were taken from the 2017 financial statements of whispering winds corp.. (all dollars are in millions.) common stock $3,230 accumulated depreciation—equipment $3,940 prepaid rent 175 accounts payable 1,560 equipment 6,940 patents 2,270 stock investments (long-term) 670 notes payable (long-term) 780 debt investments (short-term) 1,740 retained earnings 6,175 income taxes payable 150 accounts receivable 1,740 cash 1,290 inventory 1,010 prepare a classified balance sheet in good form as of december 31, 2017. (list current assets in order of liquidity.)