Google Shopping Results Display $0 Prices With Monthly Fees

The Google Merchant Center docs say “Submit the cost as the total up-front payment (including activation charges and gadget down payment). The price can be as low as 0 if the cost of your mobile phone or tablet is subsidized and bundled with installment payments or a subscription plan. This is not suitable to Latin America where the cost is not an up-front payment, but is always the complete rate of the product.