Sales report challenge

sales_report.py

# Assign the following string to a variable named sales_string. "Monthly Sales Report\nDate: 03-17-2015\nOffice: Codeup\n ===================================================\nEmployee Number, First Name, Last Name, Sales Units\n***************************************************\n\n1, Jane, Janeway, 3\n3, Tricia, Triciason, 5\n4, Jeannette, Jeanson, 4\n5, Charles Emmerson III, Winchester, 2\n6, Chet, Chedderson, 8\n7, Chaiam, Chaiamson, 12\n8, Dale, Dalesinger, 1\n9, Zig, Ziglar, 50\n10, Henry, Kissinger, 1\n11, Arthur Herbert, Fonzarelli, 23\n12, Betty, Boop, 67". Now, write a function named sales_report() that takes in the sales_string as an argument. 
# Now write a function named sales_report() that takes in this string as its input.
# The sales_report will be returning a dictionary with the following keys
# number_of_employees is a key that returns a value containing the number of employees
# total_units_sold is a sum of all units sold by this sales team
# average units sold per employee is the total units sold divided by number of employees.
# most_units is a key that points to the name of the highest performing salesperson
# least_units is a key that points to the name of the lowest performing salesperson

sales_string = "Monthly Sales Report\nDate: 03-17-2015\nOffice: Home Office\n ===================================================\nEmployee Number, First Name, Last Name, Sales Units\n***************************************************\n\n1, Jane, Janeway, 3\n3, Tricia, Triciason, 5\n4, Jeannette, Jeanson, 4\n5, Charles Emmerson III, Winchester, 2\n6, Chet, Chedderson, 8\n7, Chaiam, Chaiamson, 12\n8, Dale, Dalesinger, 1\n9, Zig, Ziglar, 50\n10, Henry, Kissinger, 1\n11, Arthur Herbert, Fonzarelli, 23\n12, Betty, Boop, 67"

# Hint: this input is a CSV format, like a spreadsheet! 
# Since a CSV is two dimensional data, recommend splitting the original string to produce a list of strings.
# To identify the "delimeter", focus on which character separates each "row" of data.
# Some rows contain only formatting characters. Ignore or delete these rows.
# This list of strings contains the rows of data where each row is a full string containing all values.
# The first string of the list of strings should be "Monthly Sales Report". The next should be the Date, etc...
# Consider that each "row" may need to be split by another delimeter to access each field.