Answer:
fund balance will increase by $404,000
Explanation:
Given data:
Fund levived in taxes $350,000
1% of fund expected to be uncollectible
Amount of fund collected $7500 as interest revenue
$ 50,000 transferred to general fund
As  it is given 1% is uncollectible , remaining value would be 
= $350,000- $3,500    (1% * $350,000) 
= $346,500
The other inflows are $7,500 + $50,000, 
Total inflow is  =  $57,500.
Total transaction =  $346,500 + $57,500 = $404,000