Customs valuation factors determine additions and deductions to transaction value for import assessment under the customs manual. Customs valuation adjusts the price actually paid or payable by adding specified factors by addition-commissions (except buying commissions), container and packing costs, value of buyer supplied materials or tooling, consumed materials, external engineering/design work, royalties and licence fees payable as a condition of sale, resale proceeds accruing to the seller, advance payments, transport/loading/unloading/handling charges to the place of importation (including demurrage and lighterage), insurance to the place of importation, and other conditional payments not included in the price. Separately declared factors by deduction include interest on deferred payment, post importation charges, and duties and taxes payable in the importing country.