Brand an existing excel spreadsheet as a corporate branded document

I have an excel spreadsheet which has already been created with the formula calculator fields.

I need to brand this document with my client branding so that it looks like a high-end, high-tech document and not as an excel spreadsheet with a logo in the corner.

Please provide your expected cost to produce along with an example of what you expect to be able to achieve. Any additional information please let me know.