diff --git a/src/currencyExchange.c b/src/currencyExchange.c
new file mode 100644
index 0000000..b8cf582
--- /dev/null
+++ b/src/currencyExchange.c
@@ -0,0 +1,8 @@
+#include "currencyExchange.h"
+
+float toUSD(float euro) {
+
+    float USD = euro * CURRENT_USD_RATE_OF_ONE_EURO;
+
+    return USD;
+}
\ No newline at end of file