LOS ANGELES — Neill Blomkamp's R-rated robot film "Chappie" topped the box office with a lackluster $13.3 million debut, according to final figures Monday, while the Vince Vaughn comedy "Unfinished Business" proved all but dead on arrival with a $4.7 million opening.

This is the lowest showing ever for Blomkamp, who also directed "Elysium" and "District 9," and the latest in a series of box office disasters for Vaughn, whose mid-aughts profitability has stalled in recent years with the release of flops like "The Watch" and "The Dilemma."

For a low-earning weekend that has helped to clip the box office's year-to-date advantage over last year, "The Second Best Exotic Marigold Hotel" proved to be a silver lining. The PG-rated retiree comedy took in a respectable $8.5 million from only 1,573 locations.

The top 20 movies at U.S. and Canadian theaters Friday through Sunday, followed by distribution studio, gross, number of theater locations, average receipts per location, total gross and number of weeks in release, as compiled Monday by Rentrak:

1. "Chappie," Sony, $13,346,782, 3,201 locations, $4,170 average, $13,346,782, 1 week.

2. "Focus," Warner Bros., $10,007,276, 3,323 locations, $3,012 average, $34,560,772, 2 weeks.

3. "The Second Best Exotic Marigold Hotel," Fox Searchlight, $8,540,370, 1,573 locations, $5,429 average, $8,540,370, 1 week.

4. "Kingsman: The Secret Service," 20th Century Fox, $8,313,476, 3,101 locations, $2,681 average, $98,041,226, 4 weeks.

5. "The SpongeBob Movie: Sponge Out Of Water," Paramount, $6,663,712, 3,097 locations, $2,152 average, $148,656,571, 5 weeks.

6. "Fifty Shades Of Grey," Universal, $5,520,515, 2,788 locations, $1,980 average, $156,364,325, 4 weeks.

7. "McFarland, USA," Disney, $5,222,630, 2,792 locations, $1,871 average, $29,331,061, 3 weeks.

8. "The Lazarus Effect," Relativity Media, $5,076,424, 2,666 locations, $1,904 average, $17,376,740, 2 weeks.

9. "The DUFF," Lionsgate, $4,788,127, 2,559 locations, $1,871 average, $26,054,203, 3 weeks.

10. "Unfinished Business," 20th Century Fox, $4,772,613, 2,777 locations, $1,719 average, $4,772,613, 1 week.

11. "American Sniper," Warner Bros., $4,401,391, 2,545 locations, $1,729 average, $337,100,371, 11 week.

12. "Still Alice," Sony Pictures Classics, $1,577,540, 1,197 locations, $1,318 average, $14,651,150, 8 weeks.

13. "Paddington," The Weinstein Co., $1,263,985, 1,135 locations, $1,114 average, $72,063,853, 8 weeks.

14. "The Imitation Game," The Weinstein Co., $1,119,243, 862 locations, $1,298 average, $88,441,916, 15 weeks.

15. "Jupiter Ascending," Warner Bros., $1,117,047, 943 locations, $1,185 average, $45,016,323, 5 weeks.

16. "A La Mala," Lionsgate, $828,189, 384 locations, $2,157 average, $2,577,494, 2 weeks.

17. "Birdman," Fox Searchlight, $718,199, 777 locations, $924 average, $41,535,026, 21 week.

18. "Hot Tub Time Machine 2," Paramount, $540,072, 900 locations, $600 average, $11,814,937, 3 weeks.

19. "Selma," Paramount, $372,367, 270 locations, $1,379 average, $50,965,872, 11 week.

20. "The Wedding Ringer," Sony, $344,028, 310 locations, $1,110 average, $63,514,117, 8 weeks.