The cost of one wheelbarrow is R$325\mathrm{.}75$ and the markup is $17\mathrm{.}5\%$

Required

$[4]$

a$)$ Calculate the selling price.

b$)$ Explain the difference between the markup percentage and the margin

$[2]$

percentage.

$2.$ Jane purchased a laptop and afterwards sold it to Mary for R$7500$ and realized a margin of $16\%.$ Mary sold the laptop to Lebo and realized a markup of $7\%.$

$\backslash$table$[[$Required$,],[$a$),$Calculate the amount Jane paid for the laptop.,$3$