The table shows transactions in a checking account.

January
-38.50
126.30
429.40
-265.00
February
250.00
-135.20
35.50
-62.30
March
-14.00
99.90
-82.70
-1.50
April
-86.80
-570.00
100.00
-280.10
a) Find the total of the transactions for each month.

January

February

March

April

b) Find the mean total for the four months.