I'm not sure how you are interpreting your chlorine as being "out the roof" with those results. Try this. Use the dilution method described in this link to see if you can get a little closer with your chlorine reading. This dilution method is not super accurate, but better than nothing. It does not replace having a good test kit, however. You will still need a Taylor K-2006 kit.

Testing Without a Good Kit

We still need a CYA reading. That is one of the critical test results to help us help you.

Do not drain more at this point and do not worry about the alk at this point.