A professional who operates calculator and typewriter to compile and prepare customer charges, such as labor and material costs. Responsibilities include:

• Reads computer printout to ascertain monthly costs, schedule of work completed, and type of work performed for customer, such as plumbing, sheet metal, and insulation.
• Computes costs and percentage of work completed, using calculator.
• Compiles data for billing personnel.
• Types invoices indicating total items for project and cost amounts.