Kotlin chelenge "Shipping cost calculator"

Question

Can some one help me solve 2 test in Kotlin course

fun shippingCost(amount: Double, international: Boolean): Double {
if(international == true ){
if(amount<50.0 ) {
return 0.0
}
else{
return amount/100.0*15.0
}
}
else{
if(amount>75.0 ) {
return 0.0
}
else{
return amount/100.0*10.0
}
}

}
fun main(args: Array<String>) {
val total = readLine()!!.toDouble()

val international = readLine()!!.toBoolean()

println(shippingCost(total, international))

}

Answer 1

International is:
15% but max 50.00

national is:
10% for amount <75.00
0.00 for amount >= 75.00