13. Bankstown Limited was involved in a highly successful plastics manufacturing business. It commenced a project to design a more efficient extrusion system for its plastic pipes. The following outlays occurred September: researcher salaries $30 000; October: research materials $40 000; November: re-development of the extrusion plant $250 000; December: final adjustments to the extrusion plant $25 000. The amount to be expensed by Bankstown Limited at the end of the financial year, 31 December, is