Easter Decoration

package main

import (
    "fmt"
    "bufio"
    "os"
    "strconv"
)

func main() {
    scanner := bufio.NewScanner(os.Stdin)

    scanner.Scan()
    clients, _ := strconv.Atoi(scanner.Text())

    var totalSum float64
    var stock string

    for i := 0; i < clients; i++ {
        counter := 0
        sum := 0.0

        scanner.Scan()
        stock = scanner.Text()

        for stock != "Finish" {
            switch stock {
                case "basket":
                    sum += 1.50
                case "wreath":
                    sum += 3.80
                case "chocolate bunny":
                    sum += 7.00
            }
            counter++
            scanner.Scan()
            stock = scanner.Text()
        }

        if counter % 2 == 0 {
            sum *= 0.80
        }

        totalSum += sum
        fmt.Printf("You purchased %d items for %.2f leva.\n", counter, sum)
    }

    fmt.Printf("Average bill per client is: %.2f leva.\n", totalSum / float64(clients))
}