 class="kw">%&gt;%</span>
  <span class="fu"><a href="https://dplyr.tidyverse.org/reference/mutate.html">mutate</a></span>(<span class="kw">TotalCharges</span> <span class="kw">=</span> <span class="fu"><a href="https://rdrr.io/r/base/ifelse.html">ifelse</a></span>(<span class="fu"><a href="https://rdrr.io/r/base/NA.html">is.na</a></span>(<span class="no">TotalCharges</span>), <span class="no">MonthlyCharges</span>, <span class="no">TotalCharges</span>)) <span class="kw">%&gt;%</span>
  <span class="fu"><a 