definiens: means all Development Costs incurred by IDEAYA or its Affiliates in the perform ance of the MAT2A Program in accordance with the applicable Collaboration Plan u p to and until the Option Packag e Delivery Date . For the avoidance of doubt, the cost s of conducting the MAT2A Combination Study shall be borne by [COMPANY] as set out in this Agreement and the MAT2A CTCSA and are not included in the MAT2A Progr am Costs ; provided that, if the MAT2A Combination Study is conducted by IDEAYA as a combination arm of its Phase 1 Clinical Study of the MAT2A Product that also includes a Phase 1 MAT2A Monotherapy Study arm, then [COMPANY] will only pay for such combination arm and control arm, and not the Phase 1 MAT2A Monother apy Study arm of such Phase 1 Clinical Study