Answer:
26.74 ($) or change currency sign to suit.
Step-by-step explanation:
Binoculars Mark up = 10x 1.45 = 14.50
Sales tax = 14.5 x 1.085 = 15.7325
Total cost per Binocular = 15.73 ($,)
Bird Guide Mark up = 7 x 1.45 = 10.15
Sales Tax  = 10.15 x 1.085 = 11.01275
Total cost per Bird Guide = 11.01 ($)
One of each is found by addition.
15.73 + 11.01 = 26.74 ($) or change currency sign to suit.
