Please record the entries for the inventory transactions below $($Perpetual Inventory System$)$

$1)$ Oct$1$ Business purchased $$5350$ of inventory from GSC$\text{'}$s Inc.. Terms $2/10,$ n$/20$ FOB

$2)$ Oct$1$ Business sold $$7830$ inventory to NCE's Inc., the cost is $$1130.$ Terms $2/15,$ n$/30$ FOB

$3)$ Oct$4,$ Business returned defective $$275$ inventory back to GSC$\text{'}$s Inc.

$4)$ Oct$7$ Business paid delviery $$235$ for the inventory sales to NCE's Inc.

$5)$ Oct$8$ Business issued a credit memo $$215$ to NCE's Inc., regarding the sales discount on Oct$1$

$6)$ Oct$9$ business purchased inventory $$4230$ from Bob's Ltd$,$ Terms: $1/5,$ n$/10,$ FOB

$7)$ Oct$11$ Business paid the GSC$\text{'}$s Inc. in full.

$8)$ Oct$16$ Business Received NCE's Inc's money.

$9)$ Oct$30$ paid Bob's Ltd for the Oct$9$ purchase.

Please use the lecture notes as a reference to complete all the entries under the perpetual inventory system$($ if any entry is calculation related, please also indicate the calculation details$).$