While Euros are my "native" currency, the archive balance is calculated in US Dollars to make Backblaze fee calculation easier. Donations (whose value I usually only see in Euros) are converted to US Dollars and added to the balance as soon as I receive them. $0.00 (2023/02/?? - Start of the archive) - $5.60 (2023/03/01 - Expenses for February of 2023; 28 days at $0.03 + $0.17) + $10.70 (2023/03/11 - Donation of 10 Euros) + $21.60 (2023/03/21 - Donation of 20 Euros) + $5.02 (2023/03/29 - Donation of 4.53 Euros) - $7.75 (2023/04/01 - Expenses for March of 2023; 31 days at $0.05 + $0.20) + $8.62 (2023/04/26 - Donation of 7.84 Euros) - $10.80 (2023/05/01 - Expenses for April of 2023; 30 days at $0.05 + $0.31) ======== $21.79