David Gura offered his final Marketplace sign off Friday, but not before he hosted a discussion about the week that was with Leigh Gallagher of Fortune and Sudeep Reddy with the Wall Street Journal. Listen to that above, then read about some of the best stuff we learned this week at Marketplace:

Fun Fact: It can take between $70,000 and $100,000 to keep a kennel full of racing dogs running year-round. This week, Alaska hosted the Iditarod.

We spoke to Alaska’s top musher in long-distance sled dog racing history, Lance Mackey, who broke down the economics behind running races like the Iditarod. This large sum includes the cost of fuel, entry fees and food for the dogs, which costs around $5,000 every race season.

Fun Fact: Kids take an average of 113 standardized tests by the time they finish high school.

This year, standardized tests are being tied to Common Core education standards, creating a divide between schools and parents. According to a Gallup poll conducted late last year, 41 percent of teachers say they view common core standards positively, vs. 33 percent of parents. Should parents let their kids decide whether to take the Common Core tests? Take our poll: 

Fun Fact: Kraft is recalling 6.5 million boxes of macaroni and cheese.

The company said numerous consumers reported finding metal pieces in the packages. While it may be too early to determine the cost of this recall, some experts warn it proves that the food-safety system in the United States is inadequate.

Oh, one more thing: We already miss David.