daytrading may 21 afternoon, page-2

I have a question the knowledgeable crew if I may

If I have the following in my portfolio:

Q1
Parcel A bought in month 1 - 1000 units x 10c
Parcel B bought in month 2 - 1000 units x 5c

Month 12 sell 1000 units x 4c

Have I sold parcel A or B?

Q2
Parcel A bought in month 1 - 1000 units x 10c
Parcel B bought in month 2 - 500 units x 5c

Month 12 sell 500 units x 4c

Have I sold parcel A or B?


Thanks all in advance!