Budget of a film = 1200
Money they spend on equipment :-
= 62% of total expense
= 62% of 1200




Which means , the group of friends spent 744 on equipment .
Then , money they spent on costume :-
= 100 - 62 % of 1200
= 38% of 1200




Which means the group of friends spent 456 on costumes .
Therefore , the group of friends spent 456 on costumes .