Adding to a formula

Hello,

I need to add more to the formula we currently have, but not sure how to add it in. how can i add the value of L & PH so it takes 1 away for the value of L and 0.5 away for PH.

(Holiday bkd cell) =IF('SetUp Tab'!$E$6="No",(COUNTIFS($A$13:$A$377,">="&$A$1+1,$A$13:$A$377,"<="&$A$377,Q13:Q377,"H")),(COUNTIFS($A$13:$A$378,">="&$A$1+1,$A$13:$A$378,"<="&$A$378,Q13:Q378,"H")))

(holiday taken cell) =IF('SetUp Tab'!$E$6="No",(COUNTIFS($A$13:$A$377,">="&$A$13,$A$13:$A$377,"<="&$A$1,Q13:Q377,"H")),(COUNTIFS($A$13:$A$378,">="&$A$13,$A$13:$A$378,"<="&$A$1,Q13:Q378,"H")))