from decimal import Decimal

MwSt_TAX_RATE = Decimal(0.19)

def perform(inputData):
    inputData['totalBeforeTaxes'] = Decimal(0)
    for entry in inputData['entries']:
        entry['totalprice'] = Decimal(entry['count']) * Decimal(entry['unitprice'])
        inputData['totalBeforeTaxes'] += entry['totalprice']
    inputData['totalBeforeTaxes'] = inputData['totalBeforeTaxes']
    inputData['taxes'] = inputData['totalBeforeTaxes'] * MwSt_TAX_RATE
    inputData['total'] = inputData['totalBeforeTaxes'] + inputData['taxes']

    for entry in inputData['entries']:
        entry['totalprice'] = f"{entry['totalprice']:.2f}"
        entry['unitprice'] = f"{entry['unitprice']:.2f}"
    inputData['totalBeforeTaxes'] = f"{inputData['totalBeforeTaxes']:.2f}"
    inputData['taxes'] = f"{inputData['taxes']:.2f}"
    inputData['total'] = f"{inputData['total']:.2f}"

    return inputData