Calculate the total cost for the Girls' and Boys' sections for all the sanitation supplies.

Gharama ya sabuni ya maji:

$$40 \text{ jerrycans} \times 20,000 \text{ Shs/jerrycan} = 800,000 \text{ Shs}$$

Gharama ya brashi ndefu:

$$25 \text{ brashi} \times 8,000 \text{ Shs/brashi} = 200,000 \text{ Shs}$$

Gharama ya dawa ya kuua vijidudu:

$$15 \text{ pakiti} \times 12,000 \text{ Shs/pakiti} = 180,000 \text{ Shs}$$

Jumla ya gharama kwa Sehemu ya Wasichana:

$$800,000 \text{ Shs} + 200,000 \text{ Shs} + 180,000 \text{ Shs} = 1,180,000 \text{ Shs}$$

Gharama ya sabuni ya maji:

$$35 \text{ jerrycans} \times 20,000 \text{ Shs/jerrycan} = 700,000 \text{ Shs}$$

Gharama ya brashi ndefu:

$$30 \text{ brashi} \times 8,000 \text{ Shs/brashi} = 240,000 \text{ Shs}$$

Gharama ya dawa ya kuua vijidudu:

$$10 \text{ pakiti} \times 12,000 \text{ Shs/pakiti} = 120,000 \text{ Shs}$$

Jumla ya gharama kwa Sehemu ya Wavulana:

$$700,000 \text{ Shs} + 240,000 \text{ Shs} + 120,000 \text{ Shs} = 1,060,000 \text{ Shs}$$

Jumla ya gharama = Gharama ya Sehemu ya Wasichana + Gharama ya Sehemu ya Wavulana

$$1,180,000 \text{ Shs} + 1,060,000 \text{ Shs} = 2,240,000 \text{ Shs}$$

• Gharama ya jumla kwa Sehemu ya Wasichana ni: $\boxed{1,180,000 \text{ Shs}}$
• Gharama ya jumla kwa Sehemu ya Wavulana ni: $\boxed{1,060,000 \text{ Shs}}$
• Gharama ya jumla kwa shule nzima ni: $\boxed{2,240,000 \text{ Shs}}$