A computer store buys a computer system at a cost of $487.20. The selling price was first at $812, but then the store advertised a 30% markdown on the system. Answer parts a and b.
a. Find the current sale price.
The sale price is $
(Round to the nearest cent as needed.)
b. Members of the store's loyalty club get an additional 10% off their computer purchases. How much
do club members pay for the computer with their discount?
The price for club members is $
(Round to the nearest cent as needed)

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno step statement reason 1 ∠oln ≅ ∠lno given 2 draw oe as a perpendicular bisector to ln by construction 3 ∠leo ≅ ∠neo transitive property of equality 4 m∠leo = 90° definition of a perpendicular bisector 5 m∠neo = 90° definition of a perpendicular bisector 6 le ≅ en definition of a perpendicular bisector 7 δole ≅ δone side-angle-side (sas) postulate 8 ol ≅ on cpctc nina made two errors in the proof. identify and correct the errors.