An inventory record card shows the following details:March$1770$ units in inventory at cost of $10$ per unit$90$ units purchased at a cost of $12$ per unit$112275$ units sold at $5025$ units purchased at a cost of $16$ per unit$2840$ units sold At $50$

Required:$1.$ Calculate the value of inventory at $31$st March using the FIFO, LIFO and AVCO methods $($Perpetual system$)\mathrm{.}2.$ Calculate the Gross Profit under FIFO, LIFO and AVCO.