Darryl Corp., a local builder, is constructing a warehouse for one of its customers. Construction began on January 1, 2021, and is expected to last for two years. The following expenditures were made related to this project in 2021:

January 1:	$600,000
April 30:	900,000
September 1:	800,000

Required: Rounding calculations to the nearest whole month and whole dollar, calculate their weighted-average expenditures for 2021.