Here are the data for the past $21$ months for actual sales of a particular product:

LAST YEAR THIS YEAR

January $370305$

February $410395$

March $410340$

April $440450$

May $440455$

June $485390$

July $440350$

August $300295$

September $400355$

October $540$

November $590$

December $480$

Develop a forecast for the fourth quarter using a three$-$quarter, weighted moving average. Weight the most recent quarter $0\mathrm{.}50,$ the second most recent $0\mathrm{.}25,$ and the third $0\mathrm{.}25.$ Solve the problem using quarters, as opposed to forecasting separate months.

Note: Round your answer to $2$ decimal places.