Python code:

#The 'calculate_paint_data' is used to calculate
#total cost of the paint job
def calculate_paint_data(square_feet, paint_price):
    gallons_of_paint = square_feet / 115
    hours_of_labor = square_feet / 115 * 8
    cost_of_paint = gallons_of_paint * paint_price
    labor_charges = hours_of_labor * 20
    total_cost = cost_of_paint + labor_charges
    return gallons_of_paint, hours_of_labor, cost_of_paint, labor_charges, total_cost
#main method
def main():
    #Prompt and read the asks the user to enter the square 
    #feet of wall space to be painted and the price of 
    #the paint per gallon
    square_feet = float(input("Enter the square feet of wall space to be painted: "))
    paint_price = float(input("Enter the price of paint per gallon: "))
    #Call the methods
    gallons_of_paint, hours_of_labor, cost_of_paint, labor_charges, total_cost = calculate_paint_data(square_feet, paint_price)
    #Display output
    print("Number of gallons of paint required:", gallons_of_paint)
    print("Hours of labor required:", hours_of_labor)
    print("Cost of paint: $", format(cost_of_paint, ".2f"))
    print("Labor charges: $", format(labor_charges, ".2f"))
    print("Total cost of the paint job: $", format(total_cost, ".2f"))
if __name__ == "__main__":
    main()

Executed Output:

Enter the square feet of wall space to be painted: 200
Enter the price of paint per gallon: 5000
Number of gallons of paint required: 1.7391304347826086
Hours of labor required: 13.91304347826087
Cost of paint: $ 8695.65
Labor charges: $ 278.26
Total cost of the paint job: $ 8973.91