How do I solve this chem problem?

A new apartment complex has 155,400 yd2 of rentable space (Assume 4 Sig Figs). At $17.57 per ft2 per month, and a 70% occupancy rate, how much income will this building generate in a year?

What is the answer if “70%” is 1 Sig Fig’s? or 2 Sig Fig’s ?
What about if rate is 70.2% occupancy (i.e. 3 Sig Figs)? What is the importance of Significant Figures?