5 minute to 15 minute interval data conversion

[marlylove]

Hi, I have pricing data that I get in 5 minutes intervals.  I need to convert this pricing data to a 15 minute average.  It looks like below.  

Basically I'm trying to create column C below that is an average price per 15 minutes.  How can I do this in Alteryx?

[marlylove]

So after I have the 15 minute average prices, how do I filter it to just so those prices?  

Nevermind, I figured this out.

Thanks for the help!