The Sharma family tracks its monthly household expenses across four categories -- Groceries, Utilities, Transport, and Entertainment -- for four consecutive months. The family's expense record, in rupees, is as follows.
January: Groceries 8,000, Utilities 4,000, Transport 3,000, Entertainment 2,000. February: Groceries 9,000, Utilities 3,500, Transport 3,500, Entertainment 2,500. March: Groceries 7,500, Utilities 4,500, Transport 4,000, Entertainment 3,000. April: Groceries 8,500, Utilities 4,000, Transport 3,500, Entertainment 3,500.
The family is reviewing this record ahead of planning next year's monthly budget across all four categories, and wants to understand how spending in each category compares both across the four months and against the other categories.