Asunflower is two weeks old it is 38 centimeters tal when it is six weeks old it is 114 centimeters tall how tall is a sunflower plant that is a 3 1/2 weeks old

On the second page where you calculate total price with taxes, you get numbers that are too high.
329 + 329 × .075 should yield 353.68. Your answer was 531.74, which is much greater.
A simpler, less error-prone way to calculate the total with taxes is
329 × 1.075.

You can do the same with the second part, the no package deal. 512.29 × 1.075 = 550.71, not 875.09