A family buys 3kg of groundnuts at Sh. 6000 per kg, 0.5kg of rice at Sh. 5000 per kg, 1 bar of soap at Sh. 6000 per bar and 2 litres of cooking oil at Sh. 8000 per litre. Calculate the total expenditu

The amount spent on Rice is Sh. 2500, and the unit cost is Sh. 5000 per kg.

$$\text{Quantity of Rice} = \frac{\text{Amount}}{\text{Unit cost}} = \frac{\text{Sh. } 2500}{\text{Sh. } 5000/\text{kg}} = 0.5 \text{ kg}$$

• G.nuts: $3 \text{ kg} \times \text{Sh. } 6000/\text{kg} = \text{Sh. } 18000$
• Rice: $0.5 \text{ kg} \times \text{Sh. } 5000/\text{kg} = \text{Sh. } 2500$
• Soap: $1 \text{ bar} \times \text{Sh. } 6000/\text{bar} = \text{Sh. } 6000$
• Cooking oil: $2 \text{ litres} \times \text{Sh. } 8000/\text{litre} = \text{Sh. } 16000$

The total expenditure is the sum of all amounts:

$$\text{Total expenditure} = \text{Sh. } 18000 + \text{Sh. } 2500 + \text{Sh. } 6000 + \text{Sh. } 16000 = \text{Sh. } 42500$$

The completed table is:

Items	Quantity	Unit cost	Amount
G.nuts	3kg	Sh. 6000 per kg	Sh. 18000
Rice	0.5kg	Sh. 5000 per kg	Sh. 2500
Soap	1 bar	Sh. 6000 per bar	Sh. 6000
Cooking oil	2 litres	Sh. 8000 per litre	Sh. 16000
Total expenditure			Sh. 42500

Mr. Denis went with Sh. 50,000.

$$\text{Change} = \text{Money given} - \text{Total expenditure}$$ $$\text{Change} = \text{Sh. } 50000 - \text{Sh. } 42500 = \text{Sh. } 7500$$

a) The completed table is shown above.

b) The change is:

$$\boxed{\text{Sh. } 7500}$$