A question related to B1 sizing

Dear all,

I've a retail customer who wants to implement B1 for their management and integrate with their shops' POS daily sales:

- Shops sell via POS software and send data to HQ: ~ 700 bills/day, 2 line items/bill.

- Sales Data in HQ is automatically imported to AR and Incoming Payment in SAP B1 one by one, ~ 700 ARs/day + 700 Incoming Payments/day.

- Item Master Data: 6,000

- End-customers: 200,000

Do you have any sizing sample for the case for calculating DB Size, HW specs needed? I usually use Sizing Guide.xls file from SDN but it seems not to be correct for B1 8.8 versions, B1 8.8 DB increases extremely.

Thank you,

Doan