| 摘要 |
An apparatus for and method of comparing an inventory of a competitor's products with a supplier's suggested inventory are provided utilizing a competitor's part numbers sheet having a first arrangement of the competitor's part numbers thereon with a vacancy adjacent each part number for marking the quantity of each number to define the inventory of competitor's products and a supplier's part number sheet is provided having a second arrangement of the supplier's part numbers thereon which is identical to the first arrangement with the supplier's sheet having an opening therein adjacent its numbers whereupon the supplier's sheet is aligned over the competitor's sheet so that the supplier's sheet hides the first arrangement of part numbers and each quantity of competitor's part numbers is viewable through the opening opposite a corresponding supplier's part number, whereby each supplier's part number and its viewable quantity comprise the supplier's suggested inventory.
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