(i) Fee to a mechanic paid by a firm is intermediate consumption expenditure of a firm. Since the inclusion of intermediate consumption expenditure leads to double counting, it will not be included in estimating GDP at market Price.
(ii) Interest paid by an individual on a car loan taken from the bank will not be included in estimating GDP at market price since the loan is used for consumption purpose and not for production purpose.
(iii) A car is a capital good for a firm, therefore, expenditure on purchasing a car for use by a firm will be a part of the gross domestic fixed capital formation and will be included in estimating GDP at market price by expenditure method.