English to Romanian Bus/Financial Finance (general)

Acelasi context...

"the Contractor shall procure and deliver to the Employer the Performance Security at its’ own expense and in accordance with Appendix J with a good and sufficient surety approved by the Employer or the guarantee of a Bank or Insurance Company approved by the Employer who shall be jointly and severally bound with the Contractor in the sum of 10% of the accumulated BMSC over one year, reduced by the lease compensation and the assumed disposal charge accumulated over one year [10%*(BMSC-monthly lease compensation – monthly assumed disposal charge) *12]. of the total expenditure for the due performance by the Contractor of its’ obligations under this Contract."