Perpetual inventory using LIFO

Beginning inventory, purchases, and sales for Item $88-Hx$ are as follows:

$\backslash$table$[[y1,$Inventory,$110$ units @ $$33],[$July $8,$Sale,$88$ units$],[$July $15,$Purchase,$122$ units @$$35],[$July $27,$Sale,$102$ units$]]$

Assuming $$ perpetual inventory system and using the last$-$in$,$ first$-$out $($LIFO$)$ method, determine $($a$)$ the cost of goods sold on July $27$ and $($b$)$ the inventory on July $31.$

a$.$ Cost of goods sold on July $27$

b$.$ Inventory on July $311,426$