You missed a 0.
Shaheds cost over 10x that but yes they are still relatively cheap to send versus missiles. The solution is Skynex anti-drone homing rounds which are $4k to fire. In the meanwhile Ukraine has built relatively cheap interceptor drones which have a good if not yet complete level of effectiveness.

Another alternative is to just ougun the enemy. Ukraine can also send drone swarms across the border until every last factory and refinery is a smouldering pile of ashes.