text: /*
  pmt = function(pv, n, i) {
      pmt = pv/((1-(1+i)**(-n))/i)
      console.log(`pmt = ${Math.round(pmt*100)/100}`)
  }
  pmt(10000, 12, 0.01)
  
  pv = function(pmt, n, i) {
      pv = pmt * ((1-(1+i)**(-n))/i)
      console.log(`pv = ${Math.round(pv*100)/100}`)
  }
  pv(100, 12, 0.01)
  */
  
  