Dominic earns $285 per week plus an 8% commission rate on all his sales. If Dominic sells $4,213 worth of merchandise in one week, how much will his total earnings for the week be?

To calculate Dominic's total earnings for the week, we need to add his base salary and the commission he earns from his sales. First, let's calculate the commission earned on the sales:
Commission = Commission rate * Sales amount = 8% * $4,213 = $4,213 * 0.08

Next, we can calculate the total earnings for the week:
Total earnings = Base salary + Commission = $285 + Commission = $285 + ($4,213 * 0.08) ≈ $285 + $337.04 ≈ $622.04

Therefore, Dominic's total earnings for the week will be approximately $622.04.