We need an Excel VBA quotation system (offline) for a windows & doors company. The system must include: A protected Admin Pricing Sheet where only admin can control all prices (designs, materials, colors, glass, screens, key lock, installation rates, delivery rate). A Customer Database where users can add customers, but cannot edit or delete them without admin approval. Customers must be searchable and auto-filled into quotations. A Quotation system where: - Quotation number is automatic - Date is automatic - Expiry date is +15 days - User selects customer, adds salesperson name and remarks Each quotation must support multiple line items. Each line includes: Design, Material, Color, Glass, optional Screen, optional Key Lock, Width, Height, Quantity. The system must automatically calculate: Price per m² (based on selections) Line total (including quantity and key lock) Subtotal (all lines) Project-level calculations: Installation (optional, based on highest rate per material and total m²) Delivery (0 if ≤30 km, otherwise full km × rate) VAT 7% Final Total System must be protected: Users cannot change pricing or formulas Saved quotations cannot be edited without admin password Final quotation must be clean and ready for PDF export.