A misdemeanor (American English) or misdemeanour (British English) is any lesser criminal act in some common law legal systems. Misdemeanors are generally punished less severely than felonies, but theoretically more so than administrative infractions (also known as minor, petty, or summary offences) and regulatory offences. Many misdemeanors are punished with monetary fines.
Travelers checks represent a form of prepaid money exchangeable for goods or services on the same basis as local currency. This payment method is considered to be safer than carrying cash because identification and signature verification are required to cash a travelers check.
And certainly you don't need much cash on hand, if you have access to more through your credit card / bank / traveller cheques. Short-version: there's no exact figure, just evidence that she'll be able to cover herself for her travels.