Gabe is a new car sales manager. He started on the first day of February. The previous sales manager kept strange notes to count how many cars he had on his lot. Gabe needs to determine the number of cars on the lot. The starting count of cars in January was 124. 42 less than 4 times that amount of cars were delivered to the dealership in January. 13 cars were returned by customers and 5 of those cars were donated to charity. How many cars are on the lot? You must show work!