Toms Bistro, a local restaurant famous for its homemade pasta, has just started a side online business selling its famous pasta to Aldo, a large chain of supermarkets. Toms Bistro buys its premium wheat flour from a supplier with whom it has a long-established business relationship. The purchase of flour is made on credit on 1 June. Toms Bistro processes this flour to make pasta on 6 June and pays cash for the flour on 15 June. On 22 June, it sells the pasta to Aldo, the chain of supermarkets, and on 3 July receives cash payment for this sale. What is the cash conversion cycle (in days) in this case?