Final answer:
Mr. Whirley spent a total of $128.90 on gasoline in the past five days.
Step-by-step explanation:
To find the total amount Mr. Whirley spent on gasoline, we need to add up the expenses from the past five days. The expenses were $22.97, $25.06, $30.97, $21.38, and $28.52.
To find the total, we can simply add these amounts: $22.97 + $25.06 + $30.97 + $21.38 + $28.52 = $128.90.
So, Mr. Whirley spent a total of $128.90 on gasoline in the past five days.