单项选择题

Questions 181-185 refer to the following invoice and letter.
Product Invoice
1 set of bed sheets……$29.99
2 curtains……$100.00
1 small rug……$42.99
1 pair of sleepers……$21.99
3 pillows……$35.00
5 towels……$20.00
UrbanOnline Co.
505 North Michigan Avenue,
Chicago IL 60611
To whom it may concern:
My name is Janet Perez, and I ordered some products from your online shop. I received the products and invoice, but there are some mistakes with my order.
The invoice states that I ordered two curtains, but in fact, I only ordered and received one. I would like to make sure that I am refunded the extra money I paid for the extra curtain.
It is also written on the invoice that I ordered a small rug. I never ordered the rug, but I received it anyway. Please give me instructions on how I can return it to you. I would like my money back for this item, too.
Also, even though the price of one set of bed sheets is listed as $19.99 on your web site, I was charged $29.99. This is not a small jump in price. Could you tell me the reason for it I would like to be paid back the difference.
I am sending along a copy of my invoice. Please look at it and correct the errors as soon as possible. I will follow up this letter with a call to your headquarters.
Regards,
Janet Perez
How much of a refund does Ms. Janet Perez want for the bed sheets

A. $10.00
B. $29.99
C. $19.99
D. $42.00