Marianne invited Angel to her birthday party that will be held at Shangri-La Hotel in London. Marianne has 4 new blouses (stripes, with ruffles, long-sleeved, and sleeveless), 3 skirts (red, pink, and black), and 3 pairs of shoes (heels, sandals, flat shoes) in her closet reserved for such occasions. In how many ways can Marianne select her outfit? Calculate the total number of outfit combinations.