Your solar manufacturing facility is known for its solar panel production in Malaysia. However, over the past $60$ months, the facility has faced maintenance challenges that impact its operational costs, as shown in Table $3.$ Each breakdown results in an average loss of RM$5,000$ due to downtime and maintenance expenses. The facility is considering entering into a preventive maintenance service contract, which would still lead to some breakdowns, averaging one per month, but would cost RM$2,500$ per month.

Decide whether the facility should opt for the preventive maintenance service contract using the four$-$step approach and Draw a diagram to demonstrate the balance between preventive and breakdown maintenance.