data class Line(
  val item: String,
  val cents: Int,
)

val order = listOf(
  Line("coffee", 2400),
  Line("pastry", 1800),
  Line("tip", 800),
)

fun Line.row(): String =
  item.padEnd(10) + "$cents".padStart(6)

fun main() {
  val sum = order.sumOf { it.cents }
  val lines = order + Line("total", sum)

  lines.forEach { println(it.row()) }
}