Akira Company had the following transactions for the month

Number of units cost per units

Beginning invent $1501,500$

Purchased Mar. $311601,920$

purchased Oct$\mathrm{.}151301,920$

total goods available sale $4405,370$

end inventory $50?$

Calculate the gross margin for the period for each of the following cost allocation methods, using periodic inventory updating. Assume that all units were sold for $$25$ each. $($First$-$in first out; last in first out; weighted average$)$