Why binance sell smaller notional then I place at spot?

API Spot/Margin API
,
1

I have 12.1759 of “EUR”. I can place only about 12.0346 , then cummulativeQuoteQty of the order is 11.97295 .
So, my questions is:

  1. Why from 12.1759 I can place only 12.0346?
  2. Why when I place 12.0346, in the order is only 11,97295?
base = 'EUR'
quote = 'USDT'
tik = base + quote
print(client.get_asset_balance(base),client.get_asset_balance(quote))
print(client.create_order(symbol=tik, side='SELL', type='MARKET',  quoteOrderQty=12.0346))

{'asset': 'EUR', 'free': '12.17590000', 'locked': '0.00000000'} {'asset': 'USDT', 'free': '10.70525209', 'locked': '0.00000000'}
{'symbol': 'EURUSDT', 'orderId': 235030990, 'orderListId': -1, 'clientOrderId': 'lJhjf2DlbSc9autjQRFhgq', 'transactTime': 1667578357376, 'price': '0.00000000', 'origQty': '12.10000000', 'executedQty': '12.10000000', 'cummulativeQuoteQty': '11.97295000', 'status': 'FILLED', 'timeInForce': 'GTC', 'type': 'MARKET', 'side': 'SELL', 'fills': [{'price': '0.98950000', 'qty': '12.10000000', 'commission': '0.01197295', 'commissionAsset': 'USDT', 'tradeId': 80619897}]}

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2

How do you know you can only use 12.0346?

3

On the web-site in terminal was written this amount. I couldn’t place a bigger order.