Answer: Brian should ask a price of £520 for the guitar.
Explanation:
Given : Making cost of guitar= £325
Mark up percentage = 60%=0.60 [we divide percentage by 100 to convert into decimal]
Now , the price should be asked by Brian May for the guitar would be :
(Making cost of guitar) + 60% of (Making cost of guitar)
=(Making cost of guitar) + (0.60) x (Making cost of guitar)
= (Making cost of guitar) x (1+0.60) [By distributive property]
= (£325) x (1.60)
= £520
Hence, Brian should ask a price of £520 for the guitar.