Insert custom formula to calculate the value for this account.<br/> <b>=do</b> (Tax base),<br/> <b>=dds</b> (Document tax),<br/> <b>=su</b> (Tax base),<br/> <b>=ms</b> (product purchase price),<br /> <b>=st</b> (Total tax incl - =do+dds),<br/> <b>=m</b> (Sum products),<br/> <b>=u</b> (Sum services)