Question $1$

LumiTech Solutions received an invoice dated March $12$ from Prairie Electronics for $$7,950,$ with

terms $\frac{3}{10},\frac{1}{20},\frac{n}{45}.$ LumiTech made payments of $$2,100$ on March $22,$$$1,350$ on April $1,$ and

$$1,500$ on April $15.$ Calculate the amount that was still owed on April $16.$ Assume that March has $31$

days this year.

Question $2$