San Jose – Brick-and-mortar retail sales soared during this past spring, according to new metrics from RetailNext. Using its in-store analytics platform to collect metrics on millions of shopping trips to department stores and specialty retailers nationwide, RetailNext studied and released its analysis of traffic, conversion, sales, and average transaction values (ATV) for the spring season, including the four holidays of Easter, Mother’s Day, Memorial Day and Father’s Day, as well as the days leading up to Father’s Day and Easter Sunday.