What is wrong with this syntax?

[Simon4]

Dear all,

what is wrong with this syntax? thanks in advance

IF( ISPROJECTMAINORDER = '-1'
AND
ordercategory_code = '100'
AND
(sum(Total_cost_price_pbd) > 0.0), Total_cost_price_pbd,


(ISPROJECTMAINORDER = '-1'
AND
ordercategory_code = '100', TOTALNETAMOUNT * 0.65,
sum(SO_costprice)))

[BrunPierre · Accepted solution]

If(ISPROJECTMAINORDER   = '-1' AND ordercategory_code   = '100' AND Sum(Total_cost_price_pbd) > 0.0, Total_cost_price_pbd,
 If(ISPROJECTMAINORDER   = '-1' AND ordercategory_code   = '100', TOTALNETAMOUNT  * 0.65, Sum(SO_costprice)))