Hi All , 
During the some testing i found that, GST Base (ACY) not showing correctly in Purchase statistics page . Its just multiple the amount with Line No. Most surprising that, this issue still persist form NAV 2015 (AU) to latest Version of BC . 

All the standard showing the same value (NAV 2015 -2016-2017-2018) , I hope its a standard Bug in the product .

can some one confirm ?