Calculate the value of closing stock from the following according to FIFO method: $1$st January, $2023$: Opening balance: $50$ units @ R $4$ Receipts: $5$th January, $2023$: $100$ units @ R$512$th January, $2023$: $200$ units @ R$4\mathrm{.}50$

Issues: $2$nd January, $2023$: $30$ units $18$th January, $2023$: $150$ units