TH10 cannon and archer tower upgrade cost rebalance

Ok, first of all, cannon should be cheaper than archer tower.

It is the current upgrade cost of cannon:
1600000 3200000 6400000 7500000

1600000, ok, 3200000, ok, 6400000, ok, 7500000 ♥♥♥ is with this number.

I prefer a pattern between these numbers, so why not:
1600000 3200000 4800000 6400000 (9600000)

I am sure it will be good if th11 come. The cannon upgrade cost won't be so awkward like 7500000.

Now the archer tower:

4500000 6500000 7500000
There is no great problem but, the 6500000 was the last upgrade and the cost wasn't changed after level 13 archer tower is added. So why not 6000000? It gives more pleasure to people who are obsessed with numbers like me.

And it will be like this:
4500000 6000000 7500000 (12000000?)

And now the differences of upgrade cost between cannon and archer tower make more sense.
1600000:2500000
3200000:4500000
4800000:6000000
6400000:7500000

This is my very own opinion.

The only way this might possibly change would be with the addition of TH11 and level 14 cannons/archers, but I agree that your pricing makes more sense than what they did.