How To Write A Price Proposal Letter . If you prefer a gentler approach, use the cta in our template: It consists of a budget proposal letter and several other sections, such as a project description, period of performance, cost elements, and more. [Download 39+] Sample Letter For Sales Quotation from sistarara.blogspot.com Cover letters for price quotes. The following is the email format that should be followed while writing a sales proposal letter. The first 3 paragraphs of this letter do exactly that, by.