Incremental acquisition and retention costs (e.g. commissions paid to retailers for acquisition or retention of contracts), as well as costs that are directly incurred for the purpose to fulfil a certain contract are expensed as costs over the enforceable period of contracts on a straight-line basis as these costs are directly associated with the contracts with customers and are expected to be recoverable. Advertising, promotion, sponsoring, communication and brand marketing costs are expensed as incurred.