When you know the exact position you are applying for then you need to be sure that you tell a sales resume service that you want an objective. This objective can help you in determining how you will structure your resume. And ti will also connect the dots for the hiring manager.
This is a good advantage for you because many people today, since the market is so tight, are not able, or are too lazy to provide a clear objective. So when you show that you want a sales position and nothing else will do you will appear to be a candidate that the reviewer wants to see and interview. Never leave your resume with ambiguity because that is a deal killer for many of the people who are reading your resume. Also you want to keep in mind that you should add a key word section on your resume.