Anglerman Ale ABV

You may have read the last post and realized that I'm calling my bock ale Anglerman Ale instead of Angerman as previously posted. Also when I read back on that previous post, I saw that I hadn't listed the O.G. Good thing I wrote it on the painter's tape that I affixed to the carboy. So it started at 1.059 and ended (well it might drop in secondary) at 1.022, giving it an alcohol by volume reading of approximately 5.1%. I use the following formula if anybody is interested:

ABV=76*(A2-B2)/(1.775-A2)*(B2/0.794)

where A2 is the O.G. reading, and B2 is the F.G. reading.