I would imagine 85 would be good enough, but what do I know

This should answer all your questions.

Admission Requirements
Program Name: Computer Science I/Computer Science I Co-op

Province: Ontario

OUAC Code: MC/MCC

Degrees: B.A.Sc. (Bachelor of Applied Science)

Co-op/Internship: Students can opt into the co-op stream at any point before their final year.

Required Courses: At least six Grade 12 U/M level courses, including:

ENG4U
MCV4U
Two of: SBI4U, SCH4U, SPH4U, SES4U, ICS4U, TEJ4M
Note: Students are expected to have completed Advanced Functions (MHF4U)

Anticipated Admission Range - September 2013 (Subject to Change): low 80s

Application Deadline: January 16, 2013

Admission Decision Timing:

February - March, 2013 – Applicants presenting a minimum of 3 final or 6 midterm Grade 12 U/M courses will be considered for admission on a rolling basis (applicants must have 6 Grade 12 U/M courses completed or in progress, including program specific requirements).

April 2013 - Applicants will be reviewed again upon receipt of second semester midterm grades (offers will go out on a rolling basis as grade data is received)

Target Enrollment: 45