def apply_discount(price, discount=0.05):
    discounted_price = price * (1 - discount)
    return discounted_price

def apply_tax(price, tax=0.07):
    price_with_tax = price * (1 + tax)
    return price_with_tax

def calculate_total(price, discount=0.05, tax=0.07):
    discounted_price = apply_discount(price, discount)
    discounted_price_with_tax = apply_tax(discounted_price, tax)
    return discounted_price_with_tax

total_price_with_defaults = calculate_total(120)
total_price_with_custom_values = calculate_total(100, discount=0.10, tax=0.08)

print(f"Total cost with default discount and tax: ${total_price_with_defaults}")
print(f"Total cost with custom discount and tax: ${total_price_with_custom_values}")