Columbus, Ohio -- Retail same-store sales eased to 3.2% growth in December in the wake of November’s exceptionally strong promotional activity and an ongoing shift toward online shopping, according to Kantar Retail. The sales-weighted composite for the 31 retailers reporting -- most of them apparel retailers -- was weaker than the 5.6% same-store sales gain last month, but slightly better than the 3.0% gain in December of 2009. (The calculations no longer include Walmart, which stopped reporting monthly results in 2009. )