Andrew bakes 200 mini cinnamon rolls and 300 mini blueberry muffins. A normal cinnamon roll has 600 calories and a normal blueberry muffin has 450 calories. If a mini pastry has 1/3rd of the calories of a normal version, how many calories do the pastries he baked have?
First find the number of calories in a mini cinnamon roll: 600 calories / 3 = <<600/3=200>>200 calories
Then multiply that number by the number of mini cinnamon rolls: 200 calories/roll * 200 rolls = <<200*200=40000>>40000 calories
Then find the number of calories in a mini blueberry muffin: 450 calories / 3 = <<450/3=150>>150 calories
Then multiply that number by the number of mini blueberry muffins: 150 calories/muffin * 300 muffins = <<150*300=45000>>45000 calories
Then add the number of calories from each type of pastry to find the total number of calories: 45000 calories + 40000 calories = <<45000+40000=85000>>85000 calories
#### 85000