I have lurked this site for awhile and finally decided to make an account. I am starting an engineering internship this summer and want to get my dress up to par. I have a navy and charcoal grey suit, however the setting is business casual. Currently I have a few pairs of nice casual rubber soled shoes I can wear around (two different Allen Edmonds, Mephistos, and another slip on leather loafer I can't remember the brand of. Also I have the Allen Edmonds Park Avenues as my dress shoe.
What sort of pants and shirts should I look into getting? Khakis and polos? Slacks and a button down Oxford? Also this will be in Raleigh, NC so it can be quite humid during the summer. I was thinking of checking out some linen shirts. Let me know what you fellows think. Thanks for the advice!