Given an array of prices prices and a "supposed" total t, return true if there is a hidden fee added to the total (i.e. the total is greater than the sum of prices), otherwise return false.
hasHiddenFee(["$2", "$4", "$1", "$8"], "$15") ➞ false
hasHiddenFee(["$1", "$2", "$3"], "$6") ➞ false
hasHiddenFee(["$1"], "$4") ➞ true