Need minimum 5 working days to review any design, big or small and then I can firm the cost quoted. Till then, the quote may not be freezed. If the inputs drastically change than that asked for in the initial stages, the costs may vary, but once we get into an agreement, I see to that the product is done with utmost satisfaction of the employer.
I have my own decision binding to accept or reject a job before starting and cannot be bound by other employers rules. Ready to sign a mutually agreeable NDA.