This calculator is either giving completely wrong outputs for the Glacier pricing, or it's secretly throwing in some of the other costs like data transfer/API request costs.
For example, for 50 GB it's showing a cost per month of $1.15 for Standard, which is correct (Standard is priced at ~$0.023/GB). For Deep Glacier, it's giving pricing of $1.05
(which is wildly incorrect, as the price for Deep Glacier is ~$0.00099/GB, meaning the monthly cost should say $0.05, or less than 5% of the Standard cost).
For example, for 50 GB it's showing a cost per month of $1.15 for Standard, which is correct (Standard is priced at ~$0.023/GB). For Deep Glacier, it's giving pricing of $1.05 (which is wildly incorrect, as the price for Deep Glacier is ~$0.00099/GB, meaning the monthly cost should say $0.05, or less than 5% of the Standard cost).