Shirley has $$10,839\mathrm{.}50$ in her defined contribution plan at work. Of that balance, $$9,647\mathrm{.}15$ comes from her own contributions, and $$1,192\mathrm{.}35$ comes from her employer's. The plan uses the $10-$year step vesting schedule given below. If Shirley leaves her job now, after $5$ years and $6$ months of service, how much of her plan balance would she keep?