r=chipotle['quantity']*chipotle['item_price']
revenue=r.sum(axis=0)
print('Revenue = $', str(np.round(revenue)))
TypeError: ufunc 'rint' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
можете подсказать что ему не нравится в 3 строчке?