What a quantity costs at each provider, cheapest first

Prices quantity units of type at every provider selling it in pricing_model, from the published price ladders. per_gb and per_request: the cheapest of volume tiers (quantity × unit price, or the tier minimum when that is cheaper) and plans (bought as many times as needed), over one-time and monthly tiers (a monthly plan counts once); one tier per quote, tiers are not combined, except that a graduated ladder is one candidate (each band's units at that band's rate, the lowest band from 0, at least the lowest band's quantity, which is the smallest purchase, and at least the minimum charge on the lowest band). per_ip, per_port and unlimited: the same over monthly tiers, times months, plus quarterly tiers when months is a multiple of 3 and yearly tiers when it is a multiple of 12 (price × months ÷ 3 or 12); a product with only daily or weekly prices is converted at 30 days or 4.345 weeks a month and says so in notes. Trial and other once-only tiers (once: true) are never used. Only tiers matching ip_version (default ipv4 for datacenter and isp, where tiers without an IP version count as IPv4; any otherwise) and shared (default any) are priced; each quote carries the ip_version and shared of its tier, and the result echoes both filters. Without a usable ladder the quote is an estimate (estimate: true). Quotes use each provider's published list prices in USD, excluding taxes, fees, promotions and coupon codes; confirm on the provider's site before buying. Invalid values are a 400 whose error lists the allowed values; a parameter given twice is a 400; unknown parameters are named in warnings.