Danivan Drugstore has 4500 bottles of hand sanitizer gel in inventory at the beginning of the week. On Monday 2445 bottles were sold, on Tuesday 900 bottles were sold, and 50 bottles each day for the rest of the week were sold (from Wednesday until Sunday). On Saturday, the supplier delivers an order for 650 bottles. How many bottles of sanitizer gel does the Drugstore have at the end of the week?
Work out the solution step by step.