Answer:
$41,881
Step-by-step explanation:
Determine the sales value of Turnbols at split-off as follows: 
Sales Value of = Number of units x Selling Price Tumbols at split-off ] 
= 10,250 x $25 = $256,250
Determine the total sales value of all products at the split-off.
 Total Sales Value=(5,000 x $85) + (8,750x $55) + (10,250x $25)
 = $425,000 + $481,250 +$256,250 = $1,162,500
 Amount of joint costs to be allocated to turnbols: 
Joint costs to Turnbols=
Sales Value of Turnbols at splitoff/ Total Sales Value of all products x Joint Costs 
Joint costs to Turnbols =$256,250/1,162,500 x $190,000
 = $41,881
Therefore the amount of joint costs that will be allocated to the widgets is $41,881