If and if combine then the condition

Hello,

how can I combine two if commands? This is command for first requirement:

=IF(ISNUMBER(FIND("1";B38));ROUNDUP(B36*1,6/1050)*1050;"0")

But I need the follow chance:

=IF(ISNUMBER(FIND("1";B38)) && =IF(ISNUMBER(FIND("1";B39)) THEN ROUNDUP... else 0

Thank you for advice.

Silvio

Hallo

=IF( AND( ISNUMBER( FIND("1";B38)) ; ISNUMBER( FIND("1";B39)) ) ;  ROUNDUP(B36*1,6/1050)*1050 ; 0 )