Business property relief (BPR)

There’s a question on kaplan text page402 Test your understanding No 8.
Question about Zac gifting Cash of 20,000 and Farming business valued at:
Agricultural value 600,000
Development value 400,000
Total Mkt Value of Farm 1,000,000 +
Animal and Stock 150,000+
Plant & Machinery 80,000
Total Mkt value of farming Business=1,230,000.

What i understand is at plant and machinery BPR is 50%
But answer on text is calculated on 100%.

Transfer of value total 123,,0000+20,000= 1,250,000
Less : APR (600000*100%)= -600,000
Less BPR (400000+150000=550000*100%=- 550,000
Less BPR (80,000*50%)= -40,000 (On text it says 100% ie 80,000)

IS it just me that don’t understand or Its a Print mistake on text???????