Restaurant bill calculator

#This is a program that calculates how much your total restaurant bill is going to be when taking the meal cost, tip percentage, and tax percentage into factor.

def bill():
  try:
    meal_cost = float(input('Meal cost?\n'))
    tip_percent = float(input('Tip percent?\n'))
    tax_percent = float(input('Tax percent?\n'))
    total_cost =  float(round(meal_cost + tip_percent/100 + meal_cost * tax_percent/100))
    print("The total cost is: " + str(total_cost))
  except:
    if input != float:
      print('Invalid input, please enter a number.')

bill()