Use the information provided below to calculate the following:

$1\mathrm{.}4\mathrm{.}1$ Closing inventory as at $31$ March $2024$

$1\mathrm{.}4\mathrm{.}2$ Cost of goods available for sale during March $2024$

$1\mathrm{.}4\mathrm{.}3$ Gross profit for March $2024$