I can't believe that I totally forgot to mention this!!! Someone (I forgot who because a couple of weeks have gone by already) reminded me of this.
For those of you who have not mailed their packages take note, and for those of you who have this is FYI for next time.
The United States Postal Service now has flat rate boxes that are perfect for mailing kits in! The flat rate is $8.95 a box.
You can also go to the USPS's website and order a pack of 10 boxes for FREE!! All you do is pay for shipping.