I've got a hunch it'll be:
ARO High Strings Core: Vn1, Va, Vc (basic articulations, no legato) - $399
ARO Strings Expanded Players: Vn1, Vn2, Va, Vc (ornamental techniques) - $279
ARO Low Emotive Strings: Va, Vc, Vb (legato) - $329
ARO Strings Supporting Structures: Vn2 (basic articulations + legato, ornamental), Vb (basic articulations, no legato), Vc (legato only) - $289
ARO Strings Expanded Orchestrations: Vn1+Va+Vc ensemble, Vn1+Vn2+Vc ensemble, Vn1+Vn2+Vc ensemble (all basic articulations) - $339
ARO Strings Sectional Enhancements: Vn1 (legato, runs + fx), Vn2 (legato, runs + Fx), Vb (basic articulations, ornamental techniques) - $389