var store = Ext.StoreMgr.lookup("storePTRSALESITEMS");
var idx = store.getCount() - 1;
var discountPercentage = val.value;
var priceAmount = store.getAt(idx).get('PriceAmount');
var quantityTransaction = store.getAt(idx).get('QuantityTransaction');
var discount = priceAmount * quantityTransaction * discountPercentage / 100;
store.getAt(idx).set('Discount', discount);
var netAmount = (quantityTransaction * priceAmount) - discount;
if (store.getAt(idx).get('TaxType') == '1') {
    var totAmount = netAmount;
    store.getAt(idx).set('TotAmount', totAmount);
}
store.getAt(idx).set('NetAmount', netAmount);


var store = Ext.StoreMgr.lookup("storePTRSALESITEMS");
var idx = store.getCount() - 1;
var priceAmount = val.value;
var discountPercentage = store.getAt(idx).get('DiscountPercentage');
var quantityTransaction = store.getAt(idx).get('QuantityTransaction');
var discount = priceAmount * quantityTransaction * discountPercentage / 100;
var netAmount = (quantityTransaction * priceAmount) - discount;
if (store.getAt(idx).get('TaxType') == '1') {
    var totAmount = netAmount;
    store.getAt(idx).set('TotAmount', totAmount);
}
store.getAt(idx).set('Discount', discount);
store.getAt(idx).set('NetAmount', netAmount);


var store = Ext.StoreMgr.lookup("storePTRSALESITEMS"); var idx = store.getCount() - 1; var quantityTransaction = val.value; var priceAmount = store.getAt(idx).get('PriceAmount'); var discountPercentage = store.getAt(idx).get('DiscountPercentage'); var discount = priceAmount * quantityTransaction * discountPercentage / 100; var netAmount = (quantityTransaction * priceAmount) - discount; if (store.getAt(idx).get('TaxType') == '1') { var totAmount = netAmount; store.getAt(idx).set('TotAmount', totAmount); } store.getAt(idx).set('Discount', discount); store.getAt(idx).set('NetAmount', netAmount);