Earl’s savings account has an APR of 7.3%, calculates interest daily, and pays interest at the end of the month.

Earl’s savings account has an APR of 7.3%, calculates interest daily, and pays interest at the end of the month. If during the month of June, his balance was $400 for the first 10 days of the month, $1500 for the next 10 days of the month, and $600 for the last 10 days of the month, how much total interest did Earl earn in June?

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