Dear
This is in reference to your letter requesting that we bill you on the quarter basis rather than monthly from now, presents us with somewhat of a problem.
In as much as we would like to welcome you as a new client of our organization, we would like to accommodate you in every way possible. Your request, on the other hand, would result in your receiving preferential treatment for your account and it would be absolutely unfair to all of our clients who must settle their accounts within 30 days. If we were to offer the terms you have requested to all of our clients, we would soon be out of business completely.
I am sure you can understand our situation regarding this issue. We would welcome your account on our regular open account basis and hope that we will have the opportunity to offer you with our fine line of products as well as service always.