Courier Express

package main

import "fmt"

func main() {
    var weight, standardPrice, expressPrice float64
    fmt.Scanln(&weight)

    var service string
    fmt.Scanln(&service)

    var distance int
    fmt.Scanln(&distance)

    if weight < 1 {
        standardPrice = 0.03
    } else if weight >= 1 && weight < 10 {
        standardPrice = 0.05
    } else if weight >= 10 && weight < 40 {
        standardPrice = 0.10
    } else if weight >= 40 && weight < 90 {
        standardPrice = 0.15;
    } else if weight >= 90 && weight < 150 {
        standardPrice = 0.20;
    }

    if service == "express" {
        if weight < 1 {
            expressPrice = standardPrice * 0.80
        } else if weight >= 1 && weight < 10 {
            expressPrice = standardPrice * 0.40
        } else if weight >= 10 && weight < 40 {
            expressPrice = standardPrice * 0.05
        } else if weight >= 40 && weight < 90 {
            expressPrice = standardPrice * 0.02
        } else if weight >= 90 && weight < 150 {
            expressPrice = standardPrice * 0.01
        }
    }

    totalPrice := standardPrice * float64(distance) + expressPrice * float64(distance) * weight;
    fmt.Printf("The delivery of your shipment with weight of %.3f kg. would cost %.2f lv.\n", weight, totalPrice);
}