The Mann Corporation began operations in Year $1.$ Information relating to the company's purchases of inventory and sales of products for Year $1$ and Year $2$ is presented below.

$\backslash$table$[[$Year $1],[$March $1,$Purchase,$200,$units,@$,$$$40,$per unit$],[$June $1,$Sold,$120,$units,@$,$$$100,$per unit$],[$September $1,$Purchase,$100,$units,@$,$$$56,$per unit$],[$November $1,$Sold,$130,$units,@$,$$$100,$per unit$]]$

$\backslash$table$[[$Year $2],[$Marcl$,$Purchase,$100,$units,@$,$$$64,$p$],[$June$,$Sold,$80,$units,@$,$$$120,$ur$],[$Septem$,$Purchase,$100,$units,@$,$$$72,$perur$],[$November $1,$Sold,$100,$units,@$,$$$140,$per$]]$

Calculate the weighted$-$average cost of goods sold and ending inventory for Year $1$ and Year $2$ assuming use of $($a$)$ the periodic method and $($b$)$ the perpetual method.

a$.$ Weighted$-$Average Periodic. Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number.

Year $1$

Cost of goods sold $

Ending inventory $

b$.$ Weighted$-$Average Perpetual, Do not round your cost per unit. Do not round until your final answer. Round your answers to the nearest whole number.

$\backslash$table$[[$Year $1],[$Cost of goods sold $