I am accountant and that amount for the work they have done actually seems reasonable. You also have to remember that just because you spell out everything on a spreadsheet doesn't mean you have done most of the work for them.  They will still check everything and make sure all the data on the spreadsheet is correct. Also generally, accountants will charge about $100 an hour if an accountant with a low level of experience or qualifications does your work and up to about $200 an hour if an accountant of a high level of experience or qualifications does your work.

Hope you find this useful.