Answer:
-55
Step-by-step explanation:
2nd term=> -1 + -2 × (2 - 1)
3rd term=> -1 + -2 × (3 - 1)
:
28th term=> -1 + -2 × (28 - 1)
=> -1 - 54 = -55
Divide vat by price
40/400 = 0.1
Multiply by 100
0.1 x 100 = 10%
Rate of vat is 10%
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