If a box of tissue has 20 packs of tissues, ten boxes have 20 packs/box * 10 boxes = <<20*10=200>>200 packs
Since each pack has 100 tissues, Annalise bought 100 tissues/pack * 200 packs = <<100*200=20000>>20000 tissues.
Annalise bought 20000 tissues at five cents each, at a total cost of 20000 tissues * $0.05 = $<<20000*0.05=1000>>1000
#### 1000