Inexplicably Price

The 2 filters have come and have equal exchange one of them into the existing old.
Now here is an observation and a question at the same time:
The filter weighs whole 1.5 grams, is made of soft felt and costs 13,95
So in a double pack 27,89
How so comes about a price ??? that would really be interested times.
That would be just the same as if I had to pay for 1 egg 2.
Although Sorry that is not a direct comparison but still realistic.
Who deserves the big money? The sender or the company Grünbeck ...