math question

the question asks  " How many more dollars ...." that implies  a subtraction and a worked answer.

Simple Interest:

Simple Interest  =  Principal x Rate x Time   --->   20000 x 0.06 x 4  =  4800.00

Total Value  =  $20,000.00 + $4,800.00  =  $24,800.00

Compound Interest:

A  =  P(1 + r/n)^n·t

Where A = Total Amount         P = Principal = 20000         r = yearly rate (as a decimal) = 0.07

n = number of times compounded per year = 4                 t = number of years = 4

A = 20000(1 + 0.07/4)^4·4  =  20000(1 + 0.0175)¹⁶  =  $26,398.59

Combine these figures for the final answer ...

What do I combine? sorry