alive wrote:

Correct option is (A)

Lets say total charge X = 1.06 ( Parts + Labour)

its given parts = 50

so x = 1.06 ( 50 + Labour)

S1: The sales tax on the charge for labor was $9.60

That means labour would been = 160

So S1 is sufficient.

S2: The total sales tax was $12.60.

This statement dosen't provide any information about the distribution of parts & labout in our original euation:

X = 1.06 ( Parts + Labour)

There are multiple answers for S2, so it is insufficient.

Hope that helps.

2) total salex tax 12.60

we know the tax rate 6% and parts cost $50

we can find parts tax $3 from there and subtract from 12.60 which gives 9.60

from 9.60 we can calculate the price 9.60*100/6 =160

therefore sufficient

D

both are suff

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