The following information relates to Pina Back Falls Ltd$.\text{'}$s inventory transactions during the month of February. All of the units sold were priced at $$87$ per unit. calculate Pina Backs cost of goods sold, gross margin and ending inventory for the month of febuary using weighted average. $($Round all calculations for cost per unit to $2$ decimal places, eg $10\mathrm{.}52$ and final answers to $0$ decimal places $,$ eg$.61,052.$