Being honest is the best approach. After you have presented your experiences on your resume, I would take the time to explain the transitions in your cover letter.
A good résumé can be hard to find, so here's a solid sample résumé to help ... mid-level professionals with three to five years of relevant work experience. Follow these tips to make the ...
Of course not including them leaves me with a 4-year gap in my work history ... to your current career target? Your resume shows that most of your experience has been in sales and customer service.