we write profit and loss account because this particular 
performa has got one debit side n one credit side if credit 
amount is more we get profit n if debit amount is more we 
get loss and at the begnning of the year we will be not 
knowing whether we will get net profit or loss so we will 
write porfit & loss account...we generally dont use profit 
or loss account because in accouting system the performa is 
set as profit & loss account we cant change the rules of 
accouting standards we we have to follow this performa 
only..