Find the sum of all five digit numbers ,that can be formed using the digits `1, 2, 3, 4 and 5` (repetition of digits not allowed)

Find the sum of all 4-digit numbers that can be formed using digits 1, 2, 3, 4, and 5 repetitions not allowed?

What is the sum of all three-digit numbers that can be formed using all the digits 3, 4 and 5, when repetition of digits is not allowed ?

The sum of all 4 digit numbers that can be formed by using the digits 2, 4, 6, 8. (repetition of digits is not being allowed)

The sum of 3 digits numbers that can be formed using the digits 3,4 and 5 when repetition of digits is not allowed is

The sum of all 4 digit numbers that can be formed by using the digits 2,4,6,8 . (repetition of digits not being allowed) is

How many three-digit even numbers can be formed using the digits 1, 2, 3, 4 and 5 when repetition of digits is not allowed ?