Key Responsibilities Prepare and calculate price quotations for the customers. Prepare customer invoices upon request and verify invoice details for accuracy before submission. Prepare Purchase Order (PO) lists according to customer requests using Microsoft Excel. Prepare purchase costing in both Excel and the ERP System and ensure costing accuracy before order processing. Calculate Gross Profit (GP) for commission purposes. Conduct monthly physical inventory (ground check). Coordinate with relevant departments to resolve inventory issues. Maintain accurate sales, purchasing, costing, and invoice documentation. Any other related duties assigned by management team.