Trent earns scores of 64, 87, and 70 on three chapter tests for a certain class. His homework grade is 63 and his grade for a class project is 66. The overall average for the course is computed as follows: the average of the three chapter tests makes up 40% of the course grade; homework accounts for 20% of the grade; the project accounts for 20%; and the final exam accounts for 20%. What scores can Trent earn on the final exam to pass the course if he needs a "C" or better? A "C" or better requires an overall score of 70 or better, and 100 is the highest score that can be earned on the final exam. Assume that only whole-number scores are given. To obtain a “C” or better, Trent needs to score between [blank] and [blank], inclusive.