A small poultry farm has 300 chickens, 200 turkeys and 80 guinea fowls. A strange, incurable disease hit the farm and every day the farmer lost 20 chickens, 8 turkeys and 5 guinea fowls. After a week, how many birds will be left in the poultry?
There are 300+200+80 = <<300+200+80=580>>580 birds in total
Every day 20+8+5 = <<20+8+5=33>>33 birds are lost
After a week which is 7 days, 33*7 = <<33*7=231>>231 birds would be lost
There would be 580-231 = <<580-231=349>>349 birds left in the poultry
#### 349