FurnaceLevels.json:
{
"Main Settings": {
"Currency Type": "Economics", <- Item/Economics/ServerRewards
"Currency Display Name": "$",
"Currency Item ID (only if type is Item)": 0,
"Large Furnace Cost Multiplier - Default 1.0x": 1.0
},
"Speed (Default is 0.5 - Lowering value increases smelting speed)": {
"Modifier": [
0.5,
0.4,
0.3,
0.2
],
"Upgrade Price": [
0,
30,
50,
70
]
},
}