On January 1, 20X1, Alpha Corporation purchased machinery for $100,000 cash. The machinery has a useful life of 10 years and a residual value of $10,000. Calculate the depreciation expense for the year 20X1 using the straight-line method.

Additionally, Alpha Corporation made the following transactions during 20X1:

• March 1: Paid $5,000 for machinery repairs.
• June 1: Purchased additional machinery parts for $8,000.
• September 1: Paid $3,000 for machinery maintenance services.

Required:

• Calculate the total depreciation expense for the year 20X1.
• Prepare journal entries for the machinery-related transactions.