First choose the unit: item rows, quantities or money
A bill item row represents one listed product entry. The quantity column says how much of that product was purchased. Price × quantity gives the row cost. These are different measurements. The lecturers initially explore quantities, then explicitly switch to counting ROWS because mixing kilos, packets and individual pieces is unclear.
| Bill 1 excerpt | Quantity | Contribution to Food row count |
|---|---|---|
| Carrots | 1.5 | 1 |
| Tomatoes | 2 | 1 |
| Bananas | 8 | 1 |
| Excerpt total | Do not mix these units | 3 rows |
The full Bill 1 has seven rows: five Food, one Toiletries and one Apparel. The illustration is only a three-row excerpt. Across all 30 original bills there are 155 item rows, of which 97 are Food under the stated broad-category map. We keep row names and original category labels so these counts can be checked.
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A single bananas row has quantity 12. How much does it add?
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One Food row under this task’s unit.
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Does a bill with five food rows represent five separate bills?
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No. It is one bill with five qualifying item rows.
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Can the Food row maximum identify the highest spender in rupees?
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No. The count does not use prices or costs. A money-based question needs a separate sum.