Dec 2019: Matches RFI to Decadal Survey 2020

  * For PUMA-32K we increased the R&D period from 4 to 5 years;

  * We substantially revised the construction cost estimate for the
    correlator. First, we recalculated the number of operations/second
    based on the number of lattice sites needed in FFT correlation
    mode and additionally developed a new per-operation cost from
    CHIME / HIRAX and DSA-2000 APC whitepaper numbers;

  * Costs for operations and science were scaled as percentages of the
    construction cost based on LSST/HERA-II/CMB-S4/DESI data
    

Jul 2019: Matches PUMA APC Submission to Astro Decadal Survey 2020