His dog gets 1 carrot a day and there are 365 days in a year, so his dog eats 1*365 = <<1*365=365>>365 carrots
There are 5 carrots per bag and he will need 365 carrots, so that's 365/5 = 73 bags of carrots
The bags cost $2.00 and he will need 73 bags so that's $2*73 = $<<2*73=146.00>>146.00 worth of organic carrots
#### 146