The Purchase Beginner Item Voucher, Purchase Intermediate Item Voucher and Purchase Advanced Item Voucher recipes in the ticket exchange machine have the wrong colors.
Beginner Item Voucher's icon is blue/cyan, but the recipe's icon is red
Intermediate Item Voucher's icon is red, but the recipe's icon is green
Advanced Item Voucher's icon is green, but the recipe's icon is yellow

After playing around with the mod a bit and looking at the numbers, I also feel like there might be an issue with the balance in this mod.
For example:

1x Efficiency Module 3 => 5x Wad of Bills
500x Wad of Bills => 1x Intermediate Item Voucher
100x Intermediate Item Voucher => 1x Advanced Item Voucher
53x Advanced Item Voucher => 1x Efficiency Module 3

This means that it would take 530.000 Efficiency Module 3 to get the currency to buy 1 Efficiency Module 3.
If you instead use the slots it would take 599.000 Efficiency Module 3 instead.

The Purchase Beginner Item Voucher, Purchase Intermediate Item Voucher and Purchase Advanced Item Voucher recipes in the ticket exchange machine have the wrong colors.
Beginner Item Voucher's icon is blue/cyan, but the recipe's icon is red
Intermediate Item Voucher's icon is red, but the recipe's icon is green
Advanced Item Voucher's icon is green, but the recipe's icon is yellow

I was completely wrong. I will upload the corrected icon first.

After playing around with the mod a bit and looking at the numbers, I also feel like there might be an issue with the balance in this mod.
For example:
1x Efficiency Module 3 => 5x Wad of Bills 500x Wad of Bills => 1x Intermediate Item Voucher 100x Intermediate Item Voucher => 1x Advanced Item Voucher 53x Advanced Item Voucher => 1x Efficiency Module 3
This means that it would take 530.000 Efficiency Module 3 to get the currency to buy 1 Efficiency Module 3.
If you instead use the slots it would take 599.000 Efficiency Module 3 instead.

The "gacha machine" worked the same way as the vanilla furnace, only producing one output, so it truncated the result, resulting in a lower price when cashing out.
It seems that the rounding down of the numbers is the problem, as it takes 10 times the value to purchase a ticket.
I'll try to see if I can adjust the output number in the cashing recipe to make the value gap smaller.