Balance SHEET

HEY Guys I have understanding the solution of the task perhaps somebody can help me 
Can somebody explain to me how they get in the solution to
Loss on Sales of equipment 3000? How do they calculate that?
Decrease in Accounts Receivable 50,000
Decrease in Inventory 20,000 here: did they calculate : 50000-30000?
Increase in Prepaid Expenses (5,000)
Increase in Accounts Payable 180,000
Decrease in Accrued Liabilities (10,000)
And how to they calculate the other numbers ?

Can somebody explain to me how they get in the solution to
Loss on Sales of equipment 3000? How do they calculate that?
Decrease in Accounts Receivable 50,000
Decrease in Inventory 20,000 here: did they calculate : 50000-30000?
Increase in Prepaid Expenses (5,000)
Increase in Accounts Payable 180,000
Decrease in Accrued Liabilities (10,000)
And how to they calculate the other numbers ?
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