It is 7 thousand and a bunch of random numbers
The given terms are two terms apart, so their difference is twice the difference of adjacent terms.

The value of d is 4.
$64
48 would be 75% or 3/4 of the full price, so dividing it by 3 gives us 16, or 1/4. multiply by 4 to get 4/4, the whole price
156 dollars because 13 times 12 (months)
equals 156
edit: i think i got it wrong the first time. but :> is just a cute lil smiley face!