Consulting on Netsuite ERP

I want to have the following questions answered for Netsuite ERP: • Can we filter Items based on Inventory state(In Stock/Out of Stock), location, Pricelists? • Can Payments and Journal Entries be filtered on Bank Transfers Transactions. • Can Items be filtered on Location availability and Pricelists and custom fields on Items? • Understanding Item Matrix and use in orders/invoices • Discount Management in orders, invoices • Order total calculations (Discounts and taxes) • Is there a way to return all inventory transactions in NS for a date range and for a particular Item(Inventory Item) and also have a custom field returned from Inventory adjustments done via NS API.