35 Business management and consulting services in the field of accounting, namely, assisting businesses in the improvement of accounting, accounts receivable, invoicing, and payment functions, providing electronic accounting and management of accounts receivable, invoices and payment transactions; business services in the field of accounting, accounts receivable billing services, and payment functions; business services in the field of customizable accounting, accounts receivable billing services, invoicing, and payment of bills; business services in the field of automation of accounting, accounts receivable billing services, invoicing, and payments of bills; administrative processing of accounts receivable billing, invoicing, and payments; office functions in the nature of accounting, accounts receivable billing services, tracking and tracing of invoices, payments, and orders in transit