I'm using Umbraco 7.2.4 with Tea Commerce 3.0.2 for Umbraco 7

The price is updated according to some complex logic stored in an archetype based on chosen options for the product.

I'd like to use a custom orderline price calculator to calculate the price based upon the selected options.

When I try to use the example in the documentation https://documentation.teacommerce.net/net-api/price-calculators/order-line-calculator/ for the Order Line Calculator

I get a build error:

Error 1 'DavidThornber.TC.CustomOrderLineCalculator.CalculatePrice(TeaCommerce.Api.Models.OrderLine, TeaCommerce.Api.Models.Currency, TeaCommerce.Api.Models.Order)': cannot change access modifiers when overriding 'public' inherited member 'TeaCommerce.Api.PriceCalculators.OrderLineCalculator.CalculatePrice(TeaCommerce.Api.Models.OrderLine, TeaCommerce.Api.Models.Currency, TeaCommerce.Api.Models.Order)' D:\Projects\etch\david-thornber\DavidThornber.TC\PriceCalculators.cs 16 30 DavidThornber.TC

using TeaCommerce.Api.Dependency;
using TeaCommerce.Api.InformationExtractors;
using TeaCommerce.Api.Models;
using TeaCommerce.Api.PriceCalculators;
using TeaCommerce.Api.Services;

namespace DavidThornber.TC
{
  [SuppressDependency( "TeaCommerce.Api.PriceCalculators.IOrderLineCalculator", "TeaCommerce.Api" )]
  public class CustomOrderLineCalculator : OrderLineCalculator {

    public CustomOrderLineCalculator( IVatGroupService vatGroupService, IProductInformationExtractor productInformationExtractor )
      : base( vatGroupService, productInformationExtractor  ) {
    }

    protected override Price CalculatePrice( OrderLine orderLine, Currency currency, Order order ) {
      return new Price( 100M, orderLine.VatRate, currency );
    }

  }
}