#create the initial variables below
age = 28
smoker = 0
sex = 0
num_of_children = 3
bmi = 26.2

#Add insurance estimate formula below
insurance_cost = 250 * age - 128 * sex + 370 * bmi + 425 * num_of_children + 24000 * smoker - 12500
print("This person's insurance cost is " + str(insurance_cost) + " dollars")

#Age Factor
age += 4
new_insurance_cost = 250 * age - 128 * sex + 370 * bmi + 425 * num_of_children + 24000 * smoker - 12500
change_in_insurance_cost = new_insurance_cost - insurance_cost
print("The change in cost of insurance after increasing the age by 4 years is " + str(change_in_insurance_cost) + " dollars")

#BMI Factor
age = 28
bmi += 3.1
new_insurance_cost = 250 * age - 128 * sex + 370 * bmi + 425 * num_of_children + 24000 * smoker - 12500
change_in_insurance_cost = new_insurance_cost - insurance_cost
print("The change in estimated insurance cost after increasing BMI by 3.1 is " + str(change_in_insurance_cost) + " dollars")

#Male vs. Female Factor
bmi = 26.2
sex = 1
new_insurance_cost = 250 * age - 128 * sex + 370 * bmi + 425 * num_of_children + 24000 * smoker - 12500
change_in_insurance_cost = new_insurance_cost - insurance_cost
print("The change in estimated insurance cost for being male is " + str(change_in_insurance_cost) + " dollars")

#Extra Practice
#smoker factor
sex = 0
smoker = 1
new_insurance_cost = 250 * age - 128 * sex + 370 * bmi + 425 * num_of_children + 24000 * smoker - 12500
change_in_insurance_cost = new_insurance_cost - insurance_cost
print("The change in estimated insurance cost for being a smoker is " + str(change_in_insurance_cost) + " dollars")

#children factor
smoker = 0
num_of_children = 5
new_insurance_cost = 250 * age - 128 * sex + 370 * bmi + 425 * num_of_children + 24000 * smoker - 12500
change_in_insurance_cost = new_insurance_cost - insurance_cost
print("The change in estimated insurance cost after increasing the number of children by 2 is " + str(change_in_insurance_cost) + " dollars")