Classify the following expenses incurred by a fertilizer business according to cost classification (fixed cost, variable cost, mixed cost, direct material, direct labour, overhead cost and period cost)

i. Salaries of production workers

ii. Salaries of factorys manager

iii. Commission of salesperson

iv.Depreciation of machinery in plant

v. Depreciation of office equipment

vi. Chemical used in the production

vii. Delivery expenses

viii. Indirect materials