Imports System

Public Module Module1

    Public Sub Main()

        dim Cweight as decimal

        dim Sweight as decimal

        dim Gweight as decimal

        dim material as string

        dim sacks as string

        console.WriteLine("What material do you need?")

        material = console.ReadLine()

        if material = "sand" then

            console.WriteLine("How heavy is the sand?")

            Sweight = console.ReadLine()

​

        if Sweight > 50.1 then

            console.WriteLine("Invalid data, the sand is too heavy")

        else if Sweight < 49.9 then

            console.WriteLine("Invalid data, the sand is too light")

        else

            console.WriteLine(Sweight & "kg of Sand")

                    console.writeline("How many sacks do you need")

                            sacks = console.readline()

                    console.writeline("Total number of sacks: " & sacks & " sacks")

                    console.writeline("Total Weight: " & Sweight * sacks & "kg")

        end if

​

            else if material = "cement" then

            console.WriteLine("How heavy is the cement?")

            Cweight = console.ReadLine()

​

        if Cweight > 25.1 then

            console.WriteLine("Invalid data, the cement is too heavy")

        else if Cweight < 24.9 then

            console.WriteLine("Invalid data, the cement is too light")

        else

            console.WriteLine(Cweight & "kg of Cement")

                            console.writeline("How many sacks do you need")

                            sacks = console.readline()

                            console.writeline("Total number of sacks: " & sacks & " sacks")

                            console.writeline("Total Weight: " & Cweight * sacks & "kg")

                end if

                else if material = "graval" then

                console.WriteLine("How heavy is the graval?")

                Gweight = console.ReadLine()

            if Gweight > 50.1 then

                console.WriteLine("Invalid data, the graval is too heavy")

            else if Gweight < 49.9 then

                console.WriteLine("Invalid data, the graval is too light")

            else

                console.WriteLine(Gweight & "kg of Graval")

                                    console.writeline("How many sacks do you need")

                            sacks = console.readline()

                                    console.writeline("Total number of sacks: " & sacks & " sacks")

                                    console.writeline("Total Weight: " & Gweight * sacks & "kg")

            end if

            end if

                        end sub

End Module