Letter contesting credit card purchase

While I will state that I was at Clock & Company on the date mentioned, I did not make a purchase for $350. I did make a purchase of $14.48 for a small table lamp which I placed in my living room. That charge is listed directly above the $350 charge. I also notice that the charges are listed as being made an hour apart. At the time of the second purchase, I was already at work. I have attached a statement from my manager concerning this time.

I have also attached my latest billing statement as well as a copy of the $14.48 purchase receipt from Clock & Company.