The Guild: Europa 1410 - Official City Showcase Trailer

The video is about a technique for quickly and accurately determining the amount of change due from a cash transaction. It demonstrates a method of "counting up" from the purchase total to the amount tendered, avoid counting out individual coins. The example given is paying for a $12.78 purchase with a $20 bill. You would count up from $12.78: two pennies make $12.80, a twenty-cent coin (a dime) make $13.00, then seven one-dollar bills to reach $20.00. This provides the total change ($7.22) without traditional subtraction.