DISCOUNT
To find 30% off 750 you can multiply 750 by 0.3 or you can find that 10% of 750 which is 75 and multiplying it by 3. 75 x3 =225
Subtract the discount from the original cost. $750-$225= $525.
TAX
Find tax on $525.
1% of 525 is 5.25 so 7% will be 7 x 5.25 = 35 + 1.75= 36.75
TOTAL COST
$525 + $36.75 = $561.75