520 CD's because of the 9 months and we add 30 time 9 we erase the 0 and multiply the 3 with the 9 it will be 27 right we add the zero because the originla number is 30
Answer:
hi
Step-by-step explanation:

i think so…
Answer:
114
Step-by-step explanation:
550*12%=66
400*12%=48
48+66=114