anchor.diff:    clientMutationId: String
   }
   
  -type SubtotalAmount {
  -  # A formatted price with various currency formatting options.
  -  amount(
  -    decimal: String = "."
  -
  -    # Allows control of symbol position (%v = value, %s = symbol)
  -    format: String = "%s%v"
  -    precision: Int = 0
  -    symbol: String
  -    thousand: String = ","
  -  ): String
  -
  -  # An amount of money expressed in cents.
  -  cents: Float
  -
  -  # A pre-formatted price.
  -  display: String
  -}
  -
   type System {
     # Gravity system time, necessary for synchronizing device clocks.
     time: SystemTime
  
positive.code:     thousand: String = ","
    ): String
  
    # Transaction fee in cents
    transactionFeeCents: Int
  
    # A formatted price with various currency formatting options.
    transactionFee(
      decimal: String = "."
  
      # Allows control of symbol position (%v = value, %s = symbol)
  
negative.code:   sale: Sale
    calculatedCost(
      # Max bid price for the sale artwork
      bidAmountMinor: Int!
    ): CalculatedCost
  
    # Currency symbol (e.g. "$")
  