for more than one product and each are in different quantity you need to make new column for each of them
for debt some amount paid you need to make new column and only need to write debt and paid amount in paid debt
if someone new customer in debt page you need to first serach there name and then if two with same name you need to write raju\last digit mobile number or anything
WRITE BOOKING PER HOUR OR PER EVENT PRICE AND IF YOU GIVE SOMEONE IN MORE AMOUNT OR LESS AMOUNT YOU CAN WRITE IN DIDCOUNT
IF LESS THEN LESS THAN 100%
IF MORE THEN MORE THAN 100%
I WILL EDIT GST OPTION ALSO IF GST IS INCLUDED IN RETAIL SHOP