feat: make locking behaviour consistent

protocol/0083-RFPR-on_chain_referral_program.md

@@ -230,7 +230,7 @@ If a party is already a referee, and submits another `ApplyReferralCode` transac
 The network must now track the cumulative notional volume of taker trades for each party in an epoch, call this value `party_epoch_notional_taker_volume`. Note, trades generated by auction uncrossing are not counted. Each time a eligible trade is generated, the network should increment a parties `party_epoch_notional_taker_volume` by the quantum notional volume of the trade. For a spot market, the quantum is the quantum of the asset used to express the price (i.e. the [quote_asset](./0080-SPOT-product_builtin_spot.md/#1-product-parameters)).
 
 ```pseudo
-party_epoch_notional_taker_volume = party_epoch_notional_taker_volume + (trade_price * trade_size * settlement_asset_quantum)
+party_epoch_notional_taker_volume = party_epoch_notional_taker_volume + (trade_price * trade_size / settlement_asset_quantum)
 ```
 
 At the end of an epoch, the `party_epoch_notional_taker_volume` is stored by the network and each parties `party_epoch_notional_taker_volume` is reset to `0` ready for the next epoch.