Accounts Receivable Accounts Payable

Suppose firm XYZ has AR (Accounts Receivable) = 500, Sales = 3000, Inventory = 300, Cost of Goods Sold = 1200, and AP (Accounts Payable) = 100. How much cash does firm XYZ save if it reduces its Days Sales Outstanding by 10 days? What are specific activities an organization can engage in to accomplish these goals?