коэффициент сопутствующих продаж(The attach rate is a concept used broadly in business, especially in marketing, to represent the number of units of a secondary product/service sold as a direct or implied consequence of the sale of a primary product/service. It is often expressed as a sales ratio of primary to secondary units, or as secondary units sold as a percent of primary. Wiki – тж. см. tie rate wikipedia.org'More)
