ive been wanting to know if anyone knows what are the set prices for the millionaire center pet slots?

like could you give me the number and their price please?
right now im at number 5...which is 100 million sP...
but my friend told me that after an amazingly high number it goes back to 20mill sP?
please, i would like to know for future purposes.. .thank you for your time.

It starts at 20,000,000 and is increased by 20,000,000 until it gets to 200,000,000 per slot. After purchasing the first 10 slots, there are an additional 10 slots available, but the price only drops back to 20,000,000 and scales back up to 200,000,000.

thank you!