Buffer solution working with DNA -- I have to dissolve dried oligos in PBS

[chmenaive]

This is the first time I am working with DNA and I have to dissolve the dried oligos in PBS( 10mM phosphate buffer, 100mM NaCl, ph=7.4) buffer. However I don't understand how to do that. I will really appreciate if somebody can please explain me. Thank you in advance.

 

[Mayhem]

https://en.wikipedia.org/wiki/Phosphate-buffered_saline

Article outlines how to make a pH = 7.4 PBS. Might be useful.