If you would like to confirm that you have received a quotation, here is a sample template you can use to write an acknowledgment letter for receiving a quotation.
To [Recipient name]
Dear, [Recipient name]
The purpose of this letter is the acknowledgment of the receipt of your quote dated [Date]. We would like some clarity regarding the conditional nature of some of the services listed in the quote as well as the disparity between the options provided for [Specific service].
We request you to get back to us with these clarifications at the earliest as we wish for the work o start at the earliest. Kindly inform us if you no longer wish to tender for our required services.
If you wish to discuss the quotation further, you can reach me at [Number/Email].