$18-1.$ Using the specific identification method, calculate $($a$)$ the cost of ending inventory and $($b$)$ the cost of goods sold given the following: $LU18-1(2)$

$\backslash$table$[[$Date$,$Units purchased,Cost per unit,Ending inventory$],[$June $1,15$ Echo Show's $360,$$$275,2$ Echo Show's from June$],[$July $1,45$ Echo Show's $360,250,15$ Echo Show's from July$],[$August $1,60$ Echo Show's $360,240,12$ Echo Show's from August$]]$

From the following, calculate the $($a$)$ cost of ending inventory $($round the average unit cost to the nearest cent$)$ and $($b$)$ cost of goods sold using the weighted$-$average method, FIFO, and LIFO $($ending inventory shows $61$ units$).LU18-1(2)$

January $1$ inventory

April $1$

June $1$

November $1$

Number purchased $40$

$60$

$50$

$55$

$\backslash$table$[[$Cost per,Total$],[$unit$,$$$160$