function [energy_kWh_month] = energy_calculation(user_answers)
    
//This function takes the user's answers and calculates the monthly
//energy consumption in kWh per month.

//Energy - Lights
light_Wh_month = 1/80*6690/240*280*8*30;
    //1 watt per 80 lumens * 6690 lumens per 240 ft^2 * 280 ft^2 *
    //8 hours per day * 30 days per month

//Energy - Laptop(s)
laptop_Wh_month = 70*3*1*30*user_answers(5)
    //70 watts * 3 hours to charge * 1 charge per day * 30 days per month *
    //num laptops

//Energy - Cell Phones (Smart Phones)
phone_Wh_month = 17.5*3*1*30*user_answers(4);
    //17.5 watts * 3 hours to charge * 1 charge per day * 30 days per month *
    //num cell phones

//Energy - Microwave
microwave_Wh_month = 1000*0.5*30*user_answers(8);
    //1000 watts * 0.5 hours per day * 30 days per month * num microwaves

//Energy - Refrigerator
refrig_Wh_month = 160*24*0.85*30;
    //160 watts * 24 hours per day * 85% of day running * 30 days per month

//Energy - Washing Machine
wash_mach_Wh_month = 1200*0.5*user_answers(10)*52/12;
    //1200 watts * 0.5 hours per load * loads per week * weeks per month

//Energy for HVAC Mini-Split
minisplit_Wh_month = 800*12*30;
    //800 watts * 12 hours per day * 30 days per month

//Energy - Exhaust Fans
exhaust_fan_Wh_month = 12*12*30;
    //12 watts * 12 hours per day * 30 days per month

//Energy - Miscellaneous
misc_Wh_month = 500*30;
    //500 Wh per day * 30 days per month for misc small appliances

energy_kWh_month = (light_Wh_month + ...
                    laptop_Wh_month + ...
                    phone_Wh_month + ...
                    microwave_Wh_month + ...
                    refrig_Wh_month + ...
                    wash_mach_Wh_month + ...
                    minisplit_Wh_month + ...
                    exhaust_fan_Wh_month + ...
                    misc_Wh_month)/1000;
                    // watt hours * 1 kWh / 1000 Wh

endfunction