Is this the correct way to find depreciation allowance and book value for each year using straight line method?: equations used:

Depreciation allowance= d_t = (P-F)/n

Book value = B_t = P - (t*d_t)

Cost:	$20,000.00
Depreciable life:	5
Salvage value in year 5:	$1,500.00

Year	d_t = (P-F)/n	B_t = P - (t*d_t)
0		$20,000.00
1	$18,500.00	$1,500.00
2	$9,250.00	$1,500.00
3	$6,166.67	$1,500.00
4	$4,625.00	$1,500.00
5	$3,700.00	$1,500.00

I used the year as the values for n and t.