To solve this table, we need to determine the values of $A$ and $B$, following the relationship between the number of items and their cost. Based on the data, this relationship appears to be proportional.

Step 1: Confirm proportionality

• For 5 items, the cost is $20$. This gives a cost per item of: $\text{Cost per item} = \frac{20}{5} = 4 \, \text{R per item}.$

• Similarly, for 10 items, the cost is $40$: $\text{Cost per item} = \frac{40}{10} = 4 \, \text{R per item}.$

Since the cost per item is constant ($4 \, \text{R per item}$), we can conclude that the relationship is proportional.

Step 2: Calculate $A$ (cost for 7 items)

The cost for 7 items is: $A = 7 \times 4 = 28 \, \text{R}.$

Step 3: Calculate $B$ (number of items for 60 R)

To find $B$, we solve: $B = \frac{\text{Total Cost}}{\text{Cost per item}} = \frac{60}{4} = 15 \, \text{items}.$

Final Table