Use comma (,) for function argument separators rather than semi-colon (;) as per English format; and no trailing ; in the formula either
"=ROUND(ROUND(M'.$idexcel.',0)*0.13,0)+ROUNDDOWN(M'.$idexcel.'*2/1500,0)'"
Use comma (,) for function argument separators rather than semi-colon (;) as per English format; and no trailing ; in the formula either
"=ROUND(ROUND(M'.$idexcel.',0)*0.13,0)+ROUNDDOWN(M'.$idexcel.'*2/1500,0)'"