So I finally figured this out, thought I would share my solution.
I had to break all the letters up into little chunks to make this work.
It may not be the best way to go about this, but it works
10/15/2015
[return address]
«AddressBlock»
«GreetingLine»
«Paragraph1»
«Paragraph2»«Paid»«Paragraph2a»«Writeoff»
«Paragraph3»
Sincerely,
«Responsible»
«Responsible»
«LetterCode»: «InquiryNumber» - «Store»
CK: «Paid»
DD: «Writeoff»