$1.$ A Tanzanian transport company operates $200$ electric buses for public transportation in the city

of Dar es Salaam. The description of their operation is shown in the Table below:

Descriptions Units Rate $($TZS$)$

Total $($TZS$)$

Initial investment TZS $200,000,000$

Charging units$/$day kWh$/$day$/$bus $25$

Unit cost TZS$/$kWh $350$

Maintenance cost TZS$/$km $10,000$

Wages TZS$/$month$-$driver $200,000$

Daily trips #trips$/$day$-$bus $20$

Daily income TZS$/$day$-$bus $1,000,000$

Trip mileage km$/$trip $5$

a$).$ Calculate the initial investment, monthly operational cost, and monthly income in TZS$.$

b$).$ Is there any net income for this company?

c$).$ Estimate the payback period.

$2.$ What is your advice to this company?