Precipitation Calculation

[Adam]

I got this question in my chemistry class:

500 mL of 0.1 M Ca 2+ is mixed with 500 mL 0.1 M SO4 2- . What mass of calcium sulfate precipitates? Ksp for CaSO4 is 7.1X 10^-5.

I tried using an ICE table, thinking it was similar to the equilibrium calculation but that didn't work out. I've also looked in my chemistry book for a similar problem, but there wasn't anything like this. Can anyone suggest a way, or give a nudge in the right direction. I'd really appreciate it.