Hi, guys. I have a test user (testuser_ivan_divan). I've created fulfillment policy (id: 6164481000), payment policy (id: 6164497000), return policy (id: 6164483000), location (key: g2pca2bkkll1wx11), product (sku: aaa), offer (id: 8120221010), then I published the offer (successfully). What do I need to do to buy this product? Please describe in steps.