NEW YORK - Holiday season retail e-commerce spending jumped 12 pct to $27.5 billion for November through December 17 compared to the year-ago period, according to comScore.

Four individual days surpassed $900 million, led by Green Monday on December 13 with $954 million and free shipping day (December 17) with $942 million, according to comScore.

(Reporting by Jennifer Saba; Editing by Diane Craft)