Given,

Discount percent = 20%

VAT percent = 10%

Amount of discount = Rs. 750

To find, Amount of VAT

Let, marked price (M.P) = X

By formula,

Amount of discount = discount % of M.P.

or, Rs. 750 = 20% of X

or, Rs. 750 = \(\frac{\displaystyle20}{100}\times X\)

or, Rs. 750 = \(\frac x5\)

or, x = Rs. 3750

Marked price (x) = Rs. 3750

Here,

Selling price = M.P. - amount of discount = Rs. 3750 - Rs. 750

= Rs. 3000

Again, by formula

Amount of VAT = VAT% of S.P

= 10% of Rs.3000

= \(\frac{10}{100}\) x Rs. 3000

= Rs. 300

Therefore, the amount of VAT is Rs. 300.