# Summation

import csv

dates = {}
with open("invoice.csv", "r") as file:
    reader = csv.DictReader(file)
    for row in reader:
        date = row["InvoiceDate"].replace(" 00:00:00", "")
        if date in dates:
            dates[date] += float(row["Total"])
        else:
            dates[date] = float(row["Total"])

for date, total in dates.items():
    print("$" + str(total) + " on " + date)