Use of spacers to accommodate less than a capacity number of coins in a roll of coins in a case

A method comprising:

• identifying a quantity of coins to include in a transparent plastic case having a base and a cover, the case being configured to hold a capacity number of coins within an interior height inside the case;
• determining an aggregate thickness of a plurality of spacers to include with the quantity of coins in the case by subtracting an aggregate thickness of the quantity of coins from the interior height;
• determining a common thickness for each of the plurality of spacers to include with the quantity of coins in the case by dividing the aggregate thickness of a plurality of spacers by one less than the quantity of coins;
• inserting the quantity of coins and the plurality of spacers into the case such that the quantity of coins and the plurality of spacers are interleaved in an alternating sequence in a stack within the case;
• and
• attaching the cover to the base by ultrasonic welding after inserting the quantity of coins and the plurality of spacers into the case.