main.go

package main

import (
	"encoding/csv"
	"fmt"
	"io"
	"log"
	"os"
	"strconv"
)

func main() {
	if err := run(); err != nil {
		log.Fatal(err)
	}
}

func run() error {
	r, err := os.Open("orders.csv")
	if err != nil {
		return err
	}
	csvr := csv.NewReader(r)
	var total float64
	for {
		rec, err := csvr.Read()
		if err == io.EOF {
			break
		}
		if err != nil {
			return err
		}
		fmt.Println(rec[20])
		if len(rec[20]) < 1 {
			continue
		}
		amt, err := strconv.ParseFloat(rec[20][1:], 64)
		if err != nil {
			log.Println(err)
			continue
		}
		fmt.Println(amt)
		total += amt
	}
	fmt.Println(total)
	return nil
}