Good afternoon, can you please help me solve question e? i got told this answer is wrong I calculated... thank you so much in advance!

e. From the following summary details, and assuming Alex opts for quarterly GST on a cash basis, calculate the Net GST Liability for the BAS for the September quarter. Show your working in the answer. i, Sales invoices total $18,000 plus GST ii. Receipts from customers are $16,000 plus GST iii. Receipts from commercial tenant $1,500 plus GST iv. Invoices from suppliers total $12,000 plus GST v. Payments to those suppliers $11,000 plus GST vi. Payments for cash business-related expenses $1,500 plus GST. GST Amount: (Original Cost x 10%GST) / 100 e.g., GST calculation for sales invoices: ($18,000 x 10%) / 100 = $1,800 i, $1,800 GST (Sales Invoice) ii. $1,600 GST (Receipts Customers) iii. $150 GST (Receipts Commercial Tenants) iv. $1,200 GST (Supplier Invoice) v. $1,100 GST (Payments Suppliers) vi. $150 GST (Payments cash business-related expenses) The net GST amount is the GST collected on sales and other revenues, less the GST credits on business purchases including asset purchases. In this scenario, this will be calculated as followed: $1,800 +$1,600 + $150 +$1,200 =$4,750 -$1,100 $150 =$3,500 Net GST Liability