title: java.lang.NumberFormatException: For input string: "16000$" in kotlin
body: <p>I want to make display show "16000$" before click increase btn or decrease btn.
  when I make code like this error caused by :java.lang.NumberFormatException: For input string: "16000$ . but I should display $. Lets check my code and help me plz.</p>
  
  <pre><code>
    var productprice = findViewById&lt;TextView&gt;(R.id.productPrice)
          productprice.text= intent.getStringExtra("price")+"$"
          var price = productPrice.text.toString().toInt()
          var inc_val= price
          var getPrice = price
  
          decrease.isEnabled=false
  
          increase.setOnClickListener {
              increaseInteger()
              getPrice+= inc_val
              productprice.text=getPrice.toString()+"$"
          }
  
          decrease.setOnClickListener {
              decreaseInteger()
              getPrice -= inc_val
              productprice.text=getPrice.toString()+"$"
          }
  
  </code></pre>