Sagot :
Answer:
see below
Step-by-step explanation:
original selling price
divide 21600 by 12 to get unit cost of DVD player (no mark-up yet)
21600 / 12 = 1800 pesos per DVD player
multiply by 0.25 para makuha magkano patong niya
1800 x 0.25 = 450 pesos per DVD player ang patong
tas add mo yan sa 1800 para makuha ang selling price
1800 + 450 = 2250
so original selling price is 2250 pesos
selling price of two players sold at markdown rate
multiply original selling price by 25% para makuha magkano yung "discount". 2250 x 0.25 = 562.50
tas i-subtract mo yung 562.50 dun sa original selling price para makuha ang selling price pag may markdown na
2250 - 562.50 = 1687.50
so selling price at markdown rate is 1687.50 pesos
total sales
10 yung nabenta niya sa original selling price
10 x 2250 = 22500
tas 2 ang nabenta na may markdown
2 x 1687.50 = 3375
add mo yung 22500 at 3375
total sales = 25875 pesos