Updated Business Export and Import request and response formats to version 20, with the following changes:
- The price attribute in the unit export will now always either be the VAT-inclusive (gross) or VAT-exclusive (nett) price depending on the partner's account type, rather than varying per-unit in the business's system. See the unit export documentation for more details.
- Added modelCode response attribute to the unit export.
- Added manufacturerCode response attribute to the unit export.