with a One-Day rail pass online for the same price as just the pass alone ($14 since July 1, 2012), including all of the commemorative SmarTrip cards issued since 2009. Standard cards can be purchased at vending machines within all Metrorail stations, at Metro sales offices, selected retail stores, and online. The purchase price includes $2 for the card itself plus an initial fare value, which varies depending on where they are purchased: cards purchased at stations cost $10 ($2 for the card and $8 fare value), while those purchased online cost either $10 or $30 ($2 for the card and $8 or $28 fare value). The cards can be reloaded using farecard vending machines or using cash at fareboxes onboard buses. Until 2016, riders could also add value to their SmarTrip cards by trading in paper farecards (a used farecard up to $20, or an unused farecard of any value). There is a difference between SmarTrip and CharmCard on the maximum value that can be stored on the card: SmarTrip can store up to $300 in value, while CharmCard can store up to $200. SmarTrip and CharmCard have different qualifications for inter-system usage, e.g. using CharmCard on non-MTA providers, and using SmarTrip on MTA. Passes and non-cash loads (such as employee transit benefits) are stored on the card in a separate "purse" from cash loads. Purse benefits can only be used on the issuing system for that benefit, so a day pass issued by MTA on either a CharmCard or SmarTrip will only be valid on MTA, and a WMATA-issued monthly pass will not be valid on MTA even if it was loaded on a CharmCard. This does mean it is possible to have identical or different passes (like a monthly pass from one and a day pass from the other) from both WMATA and MTA simultaneously loaded on the same card. Monthly transit benefits provided by an employer will only be valid for whichever system the employer is registered with, so an employer who is registered to provide transit benefits with WMATA will only grant benefits usable on WMATA and Washington, DC-area transit providers, even if the benefits are loaded on a CharmCard. Cash loaded on either card is valid on both WMATA and MTA vehicles. This also means purse funds cannot be used for cash equivalents, so a person who is authorized for a monthly bus pass