Metlock, Inc. is a retailer operating in Calgary, Alberta. Metlock, Inc. uses the perpetual inventory method. Assume that there are no credit transactions; all amounts are settled in cash. You are provided with the following information for Metlock, Inc. for the month of January $2022.$

$\backslash$table$[[$Date$,$Description,Quantity,Unit Cost or Selling Price$],[$Dec$.31,$Ending inventory,$159,$$$18],[$Jan$.2,$Purchase,$109,20],[$Jan$.6,$Sale,$192,42],[$Jan$.9,$Purchase,$78,22],[$Jan$.10,$Sale,$52,47],[$Jan$.23,$Purchase,$97,23],[$Jan$.30,$Sale,$124,50]]$

$($a$1)$

Calculate average cost for each unit. $($Round answers to $3$ decimal places, e$.$g$.5\mathrm{.}125.)$