Chloroplast: Photosynthesis. In photosynthesis, the sun's solar energy is converted to chemical energy. The chemical energy is stored in the form of glucose (sugar). Carbon dioxide, water, and sunlight are used to produce glucose, oxygen, and water.
SEP IRA Contribution Limits 2013. You can contribute up to 25% of your total salary or 20% of your adjusted annual income to a SEP IRA, up to a limit of $51,000 in tax year 2013. This is almost twice the limit for 401(k) investors.
SEP Contribution and Distribution Basics. If you are self-employed and have no other employees or high employee turnover, a SEP IRA may be a good solution for your retirement needs. A SEP allows you to make pretax contributions similar to a traditional IRA, which reduces your taxable income rather than after-tax contributions like a Roth IRA.