are Lta. is a retailer following the perpetual inventory method. Assume that all inventory$-$related transactions

$\backslash$table$[[$December $1,$Description,,$],[$December $10,$Beginning inven,Quantity,Unit Cost $($t$)],[$December $12,$Purchase,$100,500],[1.,$Sale $($cost plus $5,250,800],[1-3.$ Journal:,Sale Return $50\%$ mark$-$up$),200,],[,$each of:$,20,]]$

$1-3.$ Journalize each of the transactions by following FIFO cost flow assumption.

$4.$ Aging schedule is given below to calculate doubtful receivables. Journalize required adjusting entry.

$\backslash$table$[[$Customer$,,,$Number of Days Past Due$],[,$Total,Not Yet Due,$30,31-60,61-90,$Over $90],[B,25,000,25,000,,,,],[\frac{B}{C},20,000,10,000,10,000,,,],[D,15,000,,7\mathrm{.}500,7,500,,],[E,32,500,,,16,250,16,250,],[\frac{t}{\text{T}\text{o}\text{t}\text{a}\text{l}},32,500,,,,16,250,16,250],[$Estimated Percental,$125,000,35,000,17,500,23,750,32,500,16,250],[$Uncollectible$,,2\%,5\%,10\%,20\%,100\%$