This is Base64 encoded data. Essentially it's a way to encode binary data into printable ASCII. You will often see this when encoding hashes or authentication tokens via HTTP.
There are lots of online Base64 decoders. OpinionatedGeek has an easy one to use. For your set of data you'll want to decode each line individually. Here is an example of the binary result from
00000000 42 8F 78 BF 42 69 3D A2 F9 F4 B4 BA 53 7C 5F 10 B.x.Bi=.....S|_.
00000010 1E 27 56 07 .'V.
It's a 20 byte value, could be a SHA1 hash. By this I mean the end result of some password hashing scheme that uses SHA1. This could be a salted hash, keyed HMAC, or performed multiple iterations over
ALGAR123. It's also possible that they performed an MD5 on the password first then performed a SHA1. Here's a nice answer about secure password hashing.