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  {Author's note: Yep, their ranking system is stupid. also don't mix up rank and grade.

  Instead of the magic circle for weapons, it's how much mana was used to create it and thus its capacity.}

  If you stumble upon this narrative on Amazon, be aware that it has been stolen from Royal Road. Please report it.

  [Spirit Weapon Info]

  ?Spirit Weapon's Grade = Weapon's Ranking × Selectability Percentage

  -Note: Weapon Ranking are numbered for this calculation. So Rank D is 1, Rank C is 2, etc.

  ?Selectability Percentage = Number of successful contracts / Total attempted contracts

  For specific pricing...

  Price = (higher price of the same grade - lower price) × remainder of grade calculation + lower price

  Note: if the weapon has special abilities, then its price will be greatly increased depending on what ability it has

  Ex: A spirit gun shield with a power ranking of A and Selectability Percentage of 67%. It has no special abilities, it's just a gun shield with some mana.

  --------------------------

  Gun Shield's Grade = 4 × 0.67 = 2.68

  Gun Shield's Grade = 2.68, Grade C

  Gun Shield's Price = 0.68 × 100 silver + 1 silver = 69 silver

  Final: Gun Shield, Rank A, Grade C. Price: 69 silver

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  The coins are the standard 100 copper = 1 silver. Here's a table, because tables.

  For greater increments of gold, they usually use bank notes instead of carrying it around. In other countries there are more currency types, but we have yet to get there.