The auditing firm (“DMCL”) for the appellant obtained the agreement of the appellant, as evidenced by a December 7, 2007 email sent by DMCL to the appellant, to fix the audit fee at a level higher than that originally estimated. In discussing, without concluding, whether DMCL had unduly delayed issuing its invoice after providing its audit opinion on January 23, 2008, Sommerfeldt J first noted (at para. 57):