An organisation $\text{'}$s inventory at $1$ July is $15$ units at $3\mathrm{.}00$ each.The following movements occur $,3$ July $20045$ units sold $$3\mathrm{.}30$ each,$8$ July $200410$ units bought $$3\mathrm{.}50$ each $,12$ July $20048$ units sold $$4\mathrm{.}00$ each what is the closing inventory $31$ July using FIFO method of inventory valuation?