Someone answered these questions already, but they seemed wrong and was hard to understand... I need more clear step by step solution..

1. In 2009, LEISURE TIME PLANNERS, LLC rented a 10,000 SF office space from Martha Associates with the following terms: 5 year lease commencing on 1/1/2009, base rent of $4.00 PSF, and an expense stop of $2 PSF. In 2010, if utilities, property and other related operating expense total $2 PSF, how much does LEISURE TIME PLANNERS need to pay Martha Associates for their 10,000 SF office space in 2010?

2. In 2009, LEISURE TIME PLANNERS, LLC rented a 10,000 SF office space from Martha Associates with the following terms: 5 year lease commencing on 1/1/2009, base rent of $4.00 PSF, and an expense stop of $2 PSF. If the utilities, property taxes, and other related operating expense total $4 PSF in 2010, how much does LEISURE TIME PLANNERS need to pay Martha Associates for their 10,000 SF office space in 2010?