There are three functions below that filter, map, and sum lists:

• remove_xs consumes a list of strings and removes any "x"s
• map_strs_to_ints consumes a list of strings and produces a list of integers
• summate consumes a list of integers and adds all the numbers together

Compose the functions in a new function named total_values such that they are applied correctly. This function should consume a list of strings (numbers and "x"s) and produces an integer representing the total ignoring the "x"s. You do not need to modify the existing functions.