BILLING Nine different billing types (i.e., job billing, estimate billing, progress/final billing, multi-job billing, media billing, retainer billing, advance billing, miscellaneous billing, and finance charge) can handle any kind of billing need for even the demanding clients. Bill clients for jobs at any point during their progress, whether the job is finished or not. Any job can be billed any number of times for any billing amount. Billing amounts are applied to job costs, automating WIP. Advances and retainers can be billed to jobs and clients, respectively. Sales tax is automatically calculated and summarized on a special sales tax report. Printed invoices look like estimates to prevent payment-delaying questions from clients.