Billboard 200? How do they figure the charts?

From Wiki
"The chart is based solely on sales (both at retail and digitally) in the United States. The sales tracking week begins on Monday and ends on Sunday. A new chart is published the following Thursday with an issue date of the following Saturday.
Example:
Monday 1 January — sales tracking week begins
Sunday 7 January — sales tracking week ends
Thursday 11 January — new chart published, with issue date of Saturday 20 January"
So does this mean the first week would be the pre-orders shipped on 5/30?
Week 1
June 26 - June 1 - pre-orders shipped
June 5 - chart published
June 7 - chart issued
Or do we go by all sales count first week? Are pre-orders included here.
June 2 - Jun 8 - sales
June 12 - chart published
June 14 - chart issued
I've never followed charts so I don't know how this works, but It's really interesting now. Anybody know how this is counted?
"The chart is based solely on sales (both at retail and digitally) in the United States. The sales tracking week begins on Monday and ends on Sunday. A new chart is published the following Thursday with an issue date of the following Saturday.
Example:
Monday 1 January — sales tracking week begins
Sunday 7 January — sales tracking week ends
Thursday 11 January — new chart published, with issue date of Saturday 20 January"
So does this mean the first week would be the pre-orders shipped on 5/30?
Week 1
June 26 - June 1 - pre-orders shipped
June 5 - chart published
June 7 - chart issued
Or do we go by all sales count first week? Are pre-orders included here.
June 2 - Jun 8 - sales
June 12 - chart published
June 14 - chart issued
I've never followed charts so I don't know how this works, but It's really interesting now. Anybody know how this is counted?