35% is the same as the decimal form 0.35 since you move the decimal point 2 spots to the left, or you can compute 35% = 35/100 = 0.35
Multiply that decimal number by the amount of merchandise sold in dollars, which is d, to get 0.35*d or just 0.35d
We don't know the value of d, so we can't compute further. We leave it as is.