How can i solve this: Ontario Corporation is planning to outsource its maintenance operation. Two

different companies provide maintenance services, and their pricing offers are as follows.

$($For both options, the initial payment is at the beginning of the contract, and the contract is

for $8$ years$)$

Company $1)$ Initial payment of $$40,000,$ then $$4,200/$month for the first three years, and

payment of $$8000/$month for the rest of the contract.

Company $2)$ Initial payment of $$30,000,$ then $$6,000/$month for the first $4$ years and starting

year $5$ the first monthly payment will be $$7,000$ and then it will be increased by $1\%$ every month

from the second month of year $5$ to the rest of the contract period.

Considering that the interest rate is $12\%$ per year compounded monthly, which company

provides a better offer in terms of equivalent monthly cost.