I am wondering if anyone can help with the last 3 on Puzzle 4:
B in a P
FO in a P
C in a PIJ
The possible numbers to choose from are 36; 20;54;40; 24
For those of you not familiar with these kind of puzzles each abbreviation relates to a number for instance D in a RA was 90 as D and RA stand for degrees in a right angle
I have conquered most of them but stumped on these last 3 so any help would be much appreciated