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