Ay hi! Hindi ako taga-Calamba pero a few of my mum friends from that area had their CS around 150k-250k depending sa hospital, mas mura sa provincial hospitals compared sa big private ones, pero talaga depende sa package at kung may complications. I'd suggest mag-inquire ka directly sa Calamba Medical Center or ang mga private hospitals doon like Perpetual Help or Ospital ng Maynila para makita mo exact rates, kasi nag-update na usually based sa OB niyo at room type, goodluck, mama!