First find the total number of goldfish Millie adds: 64 pretzels * 4 goldfish/pretzel = <<64*4=256>>256 goldfish
Then add the number of each kind of snack to find the total: 256 goldfish + 64 pretzels + 32 suckers = <<256+64+32=352>>352 snacks
Then divide the total number of snacks by the number of baggies to find the number of snacks per baggie: 352 snacks / 16 baggies = <<352/16=22>>22 snacks/baggie
#### 22