It is a suggestion only, but it is used to sell a bigger amount of something at a lower price that to sell more at once at a bigger price!!!
I'm from Argentina and I can Buy 100 miracle coins for $0.95 and 120 miracle coins for $1.19, it means that if I buy 100, I will pay $0.0095 per MC but if I buy 120, I will pay $0.0099 pero MC...so there is no point in buying 120 MC because it's more expensive!!!
My suggestions are:
1st: 20 MC more are to little more,you should offer at least 150 MC!!!
2nd: You should offer a bigger quantity of MC for a lower price, so we buy more for sure and you win more in the quantity!!!
I hope you can do something about it!!!
Greetings!!!