Selena purchased a $210-$day $$200000$ bank bill $($at simple interest$)$ on $14$ March $2023.$ Her purchase price was $$197000.$ She sold this bank bill on $22$ April $2023.$

What was her selling price, if she sold this bank bill at a yield of $4\mathrm{.}3\%$ p$.$a$.($simple interest$)?$ The correct answer is: $196050\mathrm{.}522$