Andika wasifu wa mwalimu wako.

Step 1: Formula for revenue (mapato).
$Revenue = Price per kWh \times kWh used$

Step 2: Given values with units.
Price per kWh = 150 shillings/kWh
kWh used = 200 kWh

Step 3: Substitute into formula.
$Revenue = (150 \, shillings/kWh) \times (200 \, kWh)$

Step 4: Multiply.
$150 \times 200 = 30{,}000$

Step 5: Include units.
30{,}000 shillings

30000 \text{ shillings}