Oliver has been trading for many years as a butcher. His accounts for the year ended 31 July 2020 show a profit before tax of 25,700. The following amounts have been included in the accounts: Depreciation Customer entertainment 4,200 2,500 1,650. 1,100 Loss on disposal of machinery Bank overdraft interest What is Oliver's adjusted Case I income for 2020? a. 34,050 Ob. 35,150 O c. 31,850 Od. 30,750