old_contents: from django.contrib import admin
  from .models import Person, Product, ProductCategory, Journal, Token, VendingMachineProduct
  import barsystem_base.functions
  
  @admin.register(Person)
  class PersonAdmin(admin.ModelAdmin):
      list_display = ('id', 'nick_name', 'active', 'member', 'special', 'first_name', 'last_name', 'amount', 'balance_limit', 'type')
      ordering = ('id',)
  
  @admin.register(Product)
  class ProductAdmin(admin.ModelAdmin):
      list_display = ('name', 'active', 'special', 'type', 'category', 'member_price_', 'standard_price_')
      ordering = ('id',)
  
      def member_price_(self, obj):
          return barsystem_base.functions.money_display(obj.member_price)
      def standard_price_(self, obj):
          return barsystem_base.functions.money_display(obj.standard_price)
  
  @admin.register(ProductCategory)
  class ProductCategoryAdmin(admin.ModelAdmin):
      pass
  
  @admin.register(Journal)
  class JournalAdmin(admin.ModelAdmin):
      list_display = ('moment', 'sender', 'recipient', 'product', 'items', 'amount')
      date_hierarchy = 'moment'
  
  @admin.register(Token)
  class TokenAdmin(admin.ModelAdmin):
      list_display = ('person', 'type', 'value')
  
  @admin.register(VendingMachineProduct)
  class VendingMachineProductAdmin(admin.ModelAdmin):
      pass
  
new_contents: from django.contrib import admin
  from .models import Person, Product, ProductCategory, Journal, Token, VendingMachineProduct
  import barsystem_base.functions
  
  @admin.register(Person)
  class PersonAdmin(admin.ModelAdmin):
      list_display = ('id', 'nick_name', 'active', 'member', 'special', 'first_name', 'last_name', 'amount', 'balance_limit', 'type')
      ordering = ('id',)
  
  @admin.register(Product)
  class ProductAdmin(admin.ModelAdmin):
      list_display = ('name', 'active', 'special', 'type', 'category', 'member_price_', 'standard_price_')
      ordering = ('id',)
  
      def member_price_(self, obj):
          return barsystem_base.functions.money_display(obj.member_price)
      def standard_price_(self, obj):
          return barsystem_base.functions.money_display(obj.standard_price)
  
  @admin.register(ProductCategory)
  class ProductCategoryAdmin(admin.ModelAdmin):
      pass
  
  @admin.register(Journal)
  class JournalAdmin(admin.ModelAdmin):
      list_display = ('moment', 'sender', 'recipient', 'product', 'items', 'amount')
      date_hierarchy = 'moment'
  
  @admin.register(Token)
  class TokenAdmin(admin.ModelAdmin):
      list_display = ('person', 'type', 'value')
  
  @admin.register(VendingMachineProduct)
  class VendingMachineProductAdmin(admin.ModelAdmin):
      list_display = ('code', 'product')
      ordering = ('code', )
  
subject: Change display in admin of VendingMachineProduct