Gross Price inclusive of GST calculation

Hi all

Is it possible to overcome this system update behaviour involving Gross Price inclusive of GST amount when migrating Sales transaction entry from one Retail Database to the Main Head Office Database?

SAP user input at retail outlet Sales transaction in this way

Gross Price (Price inclusive of GST) per unit SGD$7.5

Quantity = 8

Total row amount =56.07 (before GST)

Output GST calculated = 3.93

Total Invoice amount = SGD60

However when the same Sales transaction is migrated to Head Office Database, the data input becomes

Unit Price= 7.01

Quantity= 8

Gross Price (Price inclusive of GST) per unit SGD$7.5

Total row amount =56.08 (before GST)

Output GST calculated = 3.92

Total Invoice amount = SGD60