if(
  ri!pagingInfo.startIndex <= ri!length,
  /* If at least as many items as the previous start index exist, use it `*/
  ri!pagingInfo.startIndex,
  /* Otherwise, create a new start index to avoid an error */
  if(
    ri!length<=ri!pagingInfo.batchSize,
    /* If the last item in the grid was deleted or there are only enough items for one page, use 1 */
    1,
    /*` If there are multiple pages' worth remaining, adjust the start index so that the last page */
    /* of items is shown                                                                           */
    (ri!length+1)-ri!pagingInfo.batchSize
  )
)