How would you code the following form in HTML, specifically the table (Quantity boxes and the subtotal box must be fillable for the user and must also calculate the subtotal).

2 Land Of Boxes Order Form Name: Walaa Brody Email: [w.brody@widget-sales.com 162 Main Road Rondebosch Address: Cape Town Postcode: 7700 Product EconoBox Part Number Quantity Unit Price Subtotal LB 100 R5 R15 LB 200 14 R10 R40 Standard Box Premium Box/TD> LB300 1 R15 R15 Deluxe Box/TD> LB400 0 R20 Super Deluxe Box/TD> LB500 1 R30 R30 Total: R100 Credit Card Details Card Type: Mastercard Card Number: 45645 Expiry date: 03/99 American Express Diners Club C Visa 162 Main Road Rondebosch Delivery Address: Cape Town Send order Clear form