Operating expenses are presented on the face of the income statement using a classification based on the functions "Cost of sales," "Selling and marketing expenses," "Administrative expenses" and "Research and development expenses." Total expenses by function were distributed by nature as follows.


January-December
SEK in millions

20072006
Goods purchased

17,27115,307
Interconnect and roaming expenses

14,99814,065
Other network expenses

3,7272,667
Change in inventories

81-120
Personnel expenses (Note 32)

13,47712,721
Marketing expenses

6,9416,068
Other expenses

10,3089,126
Amortization, depreciation and impairment losses (Note 11)

11,70411,173
Total

78,50771,007
The main components of Other expenses are rent and leasing fees, consultants' services, IT expenses, energy expenses and travel expenses.