[Please search for tickets with the same issues as yours first before reporting!]

Plugin Version

[The full plugin version that you are running from /version ChestShop]
ChestShop version 3.10-SNAPSHOT (build 131)
 

Plugin Config

[The full config.yml file of ChestShop]
https://pastebin.com/spWP9TuT
 

Server Version

[The full server version that you are running from /version]
This server is running Paper version git-Paper-621 (MC: 1.13.2) (Implementing API version 1.13.2-R0.1-SNAPSHOT)
29.04 11:07:19 [Server] INFO Previous version: git-Paper-610 (MC: 1.13.2)
 

Server Log

[The full latest.log file]
I send if need.

What other plugins are you running?

[List of your plugins, ideally with the version] 
Plugins (101): AdditionsAPI, AdminVedelem, antiRedstoneClock, AnvilRestrict, AreaShop, BestViewDistance, BuntetesLogolo, ChangeSkin, ChatControl, ChestCommands, ChestShop, Citizens, CitizensCMD, CombatLogX, CommandHook, CommandSigns, CompatNoCheatPlus*, ConditionalCommands*, CoreProtect, CraftBook, CratesPlus, CrazyAuctions, CrazyAuctionsLog, CreativeNbtControl, Duels, EnderContainers, EntityDetection*, EpicHeads, Essentials, EssentialsChat, EssentialsGeoIP, EssentialsSpawn, EventekGUI, EventRendszer, FastAsyncVoxelSniper, FastAsyncWorldEdit, GriefPrevention, GriefPreventionFlags, HideAndSeek, HolographicDisplays, HonapStaffja, iDisguise, JukeBox, Kezdes, LockettePro, Lottery, LuckPerms, mcMMO, MineMarket-Universal, MobArena, MobFarmManager, MobHeads, Multiverse-Core, Multiverse-NetherPortals, MyCommand, MyPet, NametagEdit*, NoCheatPlus, NoSpawnerChange, NoteBlockAPI, OpenInv*, Paintball, PickupSpawners, PlaceholderAPI, PlayerWarp, PlayerWarpTab, PlotSquared, PlugMan, PocketGames, PomaAdditions, ProtocolLib*, RandomTeleport, RedstoneClockDetector*, RestrictedCreative, Ridables, Shopkeepers, SignEdit*, StaffChat, Stats, SuperLuckyBlock, SzulinapiTuzijatek, TiltottSzinek, TimeIsMoney*, TitleManager*, TokenManager, TokenStaff*, TreasureChestReloaded, VanillaAdditions, Vault, ViaBackwards*, ViaVersion*, Votifier, VotingPlugin, WDLCompanion*, WDLCompanionGriefPreventionSupport*, WorldBorder, WorldEdit, WorldGuard, WorldGuardExtraFlags, WorldGuardPomaFlags, YoutubeBridge

What is happening?

[Explain what happens and what steps should be done to reproduce the issue. Ideally with pictures and the full error log!] 
Shift click sell wrong price calculation.

What did you expect to happen?

[Explain what you expected to happen after performing the previously described steps]
Shift click sell now wrong price calculation

Please provide any additional info below
[And delete the lines in square brackets]