is it correct

Hoyes Lumber generally receives 3 checks a month. The check amounts and the collection delay for each check are shown below. Given this information, what is the amount of the average daily float? Assume each month has 30 days. Item Number Item Amount Delay 6.100 3 days 2 5,500 1 day 3 8.900 2 days 1 Select one a $6.833.33 b. $1.407.19 $1386 67 d $4.750.00 e $6.933 33