Etiquette question?

[iluvmyhusband]

I let an older(50's)lady at work(I no longer work there)look at my LTD cataloge. She ordered two items that came to $29.81. When I got the first bill I sent her a text message telling her that they haven't received the payment yet. She said that she mailed a check and she guessed that they haven't gotten it yet. That was the first of May. I got a bill again this week saying that it was past due. It is obvious that she isn't going to pay the bill. Which means that I can't order from this company ever if she doesn't pay them. I shouldn't have to pay the bill for her-noone pays my bills! What can I do to get her to pay this? I thought that since she was older and had money(she only works to have spending money on the weekends)she wouldn't try and stiff me with the bill.
YOU DON'T KNOW THE TOTAL OF THE BILL UNTIL THEY SEND THE MERCHANDISE TO YOU(THEY ADD THE S & H AND TAXES IN FOR YOU)!
I MEANT THEY SENT ME THE FIRST BILL THE FIRST OF MARCH!!!!!!