Respuesta :

Answer:

here

Step-by-step explanation:

use Gauth    Math

source given:

$370 for a membership

cost to join: $50

370 - 50  = 320

Now, 20 a month

A month comprises of 4 weeks

A year comprises of 12 months

so,

12 X 20 = 240

320 - 240 =    $120

remaining, $120

20 = 1 month

120 = 6 months

18 months???

I am not sure if this is correct, but hope it helps.