def profit_amount(actual_cost,sale_amount):
  
 if(actual_cost > sale_amount):
    amount = actual_cost - sale_amount
    return amount
 else:
    return None
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result