BQ25713: Cheapest or simplest 3s LiPo boost charger and balancer?

Hi,

I'm thinking of using the BQ25713 to charge a 3s Lipo pack from USB.  My circuit involves a microcontroller that will control the BQ25713 using I2C.

I'm wondering what's the least expensive way to add cell balancing logic?  I saw the BQ76920, but was wondering if there's anything simpler or less expensive.

Or, is there another boost lipo charge chip that includes balancing?

System load will be up to 13 watts.

Thanks,

Josh