Final answer:
Jane's total cost, including a 10% discount on her $200 purchase and the $20 overnight shipping fee, will be $200.
Step-by-step explanation:
Jane's total cost will be $200.
Dear Jane,
We are delighted to inform you that as a repeat customer, you are eligible for a 10% discount on your purchase. With the original price of the item being $200, the discount saves you $20, making the subtotal $180. Adding the $20 charge for overnight shipping, your total cost will be $200. We hope this excellent news adds to the convenience of your swift shopping experience with us!
Thank you for choosing our company, and we look forward to fulfilling your order soon.
Warm regards,
[Your Name]
[Your Position]
[Company Name]