A quotation states what you deliver, at what price and on which terms. The clearer the service is described, the easier the client's decision.
The template has the usual parts: provider and client, quotation number, date and validity, the subject with assumptions and exclusions, the items, the delivery period and payment terms, and a field for the acceptance. In the Excel file every item calculates quantity times unit price, VAT at the rate in its row (the examples use the German standard rate of 19 %) and the gross amount; the total row shows net, VAT and gross.
The template is not tax or legal advice: check the tax rate and the required details with your tax adviser.