Chef Erin completes her inventory on Thursday evening and finds that she has $$11,500$ in product on hand. Throughout the week, she purchases $$500$ in dry goods, $$900$ in dairy products, and $$1000$ in meat products. At the end of the week, she conducts inventory and finds that she has $$10,000$ in inventory left on hand. Please answer the following questions:

What was the COST OF GOODS SOLD during this time period? SHOW YOUR MATH!

If weekly Sales or Revenue is $$12,895,$ please calculate the Food Cost Percentage for that time period. BE SURE TO SHOW YOUR WORK."