系统能售出面值为6角、7角、8角、9角的铅笔，购买者可以选择一种面值的铅笔购买。先通过显示看是否有所要购买的那种铅笔是否还有存货，有存货在投钱。购买时可投入一角、五角和一元的硬币，当所投入硬币达到或超过购买者所选面值时，再确认是否购买，确认购买后，就售出一支铅笔，每次只能售出一支铅笔，并找回剩余硬币，回到初始状态；当所投硬币值不足面值时，可以通过一个复位键退回所投硬币，回到初始状态。若取消购买，就退回投入的所有钱。-The system can be sold in denominations of 60 cents, 0.7, 80 cents, 9 angle of the pencil, buyers can choose a nominal value of the pencil to buy. Through the display to see if some kind of pencil you want to buy if there inventory stock to vote the money. The time of purchase can be put into a corner of the Pentagon and a coin when the coin to meet or exceed the purchase selected nominal value, and then confirm whether to buy, confirm the purchase, it sold a pencil, a time to sell a pencil and retrieve the remaining coins back to the initial state　cast coins value less than the nominal value of coin through a reset button to return back to the initial state. If the cancellation of the purchase, they returned all the money invested.