private void jButton4ActionPerformed(
java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton4ActionPerformed
controller.removePrice();
} // GEN-LAST:event_jButton4ActionPerformed
private void jButton1ActionPerformed(
java.awt.event.ActionEvent evt) { // GEN-FIRST:event_jButton1ActionPerformed
controller.add();
} // GEN-LAST:event_jButton1ActionPerformed