1099-B question in regards which Cost Basis do I use.

I am working on my 2021 tax return and I received a 1099-B for sale of stocks. Here is what is listed

Acq date: 10.25.19

Sold date: 11.10.21

Proceeds: $55,000.00

Cost Basis: $52,173.53

Gain: $2,826.47

 

Under additional information the following is listed: the word Redemption is listed and the letters AA in small superscript font, and the next line has Original basis: $50,005.00

Which cost basis do I use when reporting sale of stock - the $52,173.53 or the $50,005.00

 

Also on the same form there is 1099-OID

on line 1 - Original issue discount for the year has an amount of $1,853.62 - looks like that is taxable income to me, is that correct?

 

thank you