Ruben Pty Ltd began operations on $1$ July $2023.$ It uses a perpetual inventory System. During July the business had the following purchases and sales:

$\backslash$table$[[$Purchase$],[$Dates$,$Units,Unit cost,Sales Unit,$],[$July $1,5,$$$82,,],[$July $6,,,3,],[$July $11,2,$$$80,,],[$July $14,,,3,],[$July $21,4,$$$91,,],[$July $27,,,3,]]$

Determine the ending inventory under a perpetual inventory system using:

FIFO

And

Average cost.