The table below presents the monthly expenditure (in dollars) of a family on different categories over a three-month period:
Category | January | February | March |
---|---|---|---|
Groceries | 400 | 450 | 470 |
Utilities | 150 | 160 | 170 |
Transportation | 200 | 180 | 210 |
Entertainment | 100 | 120 | 140 |