Billing Support Assistant, remote, flexible hours

We're a logistics company, and we're looking for an assistant to help with billing questions. Customers and carriers write to us when a charge doesn't match the quote, when an invoice is missing, or when a payment hasn't been recorded... (Budget: $25 - $50 USD, Jobs: Account Management, Accounting, Administrative Support, Billing, Customer Service, Customer Support, Data Entry, Logistics, Spreadsheets, Virtual Assistant)