The following statements have been made about budgets and standards:
(i) Budgets can be used in situations where output cannot be measured, but standards cannot be used in such situations.
(ii) Budgets can include allowances for inefficiencies in operations, but standards use performance targets which are attainable under the most favourable conditions.
(iii) Budgets are used for planning purposes, standards are used only for control purposes.
Which of the above statements is/are true?