Two sites are currently under consideration for a bridge over a small river. The north site requires a suspension bridge. The south site has a much shorter span, allowing for a truss bridge, but it would require new road construction. The suspension bridge will cost $500 million with annual inspection and maintenance costs of $350,000. In addition, the concrete deck would have to be resurfaced every 10 years at a cost of $1,000,000. The truss bridge and approach roads are expected to cost $250 million and have annual maintenance costs of $200,000. This bridge would have to be painted every 3 years at a cost of $400,000. In addition, the bridge would have to be sandblasted every 10 years at a cost of $1,900,000. The cost of purchasing right-of-way is expected to be $20 million for the suspension bridge and $150 million for the truss bridge. Compare the alternatives on the basis of their capitalized cost if the interest rate is 6% per year.

For this question, why the textbook solution won't calculate the painitng cost (400k) at the 6th year?