Suppose that after a few months' operation of the distribution centers that store managers ordered appropriately for their stores and 24-Seven was able to supply stores reliably every morning, but inventory at the distribution centers was occasionally in excess. There was no place to put it, trailer-size loads! Which of the following are possible causes of excess inventory in the distribution centers? (Select all that apply.) 1) Store managers over-ordering to minimize stock outs 2) Distribution centers ordering more than needed to supply stores 3) Store managers being inefficient in developing their orders 4) Vendors delivering more to distribution centers than was ordered 5) Distribution centers delivering excess products to stores 6) Erratic vendor deliveries, e.g., many trucks arriving at once